GNUmakefile-cross

# https://www.gnu.org/software/make/manual/make.html#Makefile-Conventions
# and https://www.gnu.org/prep/standards/standards.html

SHELL = /bin/sh

# If needed
TMPDIR ?= /tmp
# Used for ARMv7a and NEON. Android hard codes softfp
FP_ABI ?= hard
# Used for feature tests
TOUT ?= a.out
TOUT := $(strip $(TOUT))

# Allow override for the cryptest.exe recipe. Change to
# ./libcryptopp.so or ./libcryptopp.dylib to suit your
# taste. https://github.com/weidai11/cryptopp/issues/866
LINK_LIBRARY ?= ./libcryptopp.a
LINK_LIBRARY_PATH ?= ./

# Default CXXFLAGS if none were provided
CXXFLAGS ?= -DNDEBUG -g2 -O3 -fPIC -pipe

AR ?= ar
ARFLAGS ?= cr
RANLIB ?= ranlib
CP ?= cp
MV ?= mv
CHMOD ?= chmod
MKDIR ?= mkdir -p
GREP ?= grep
SED ?= sed

LN ?= ln -sf
LDCONF ?= /sbin/ldconfig -n

IS_IOS ?= 0
IS_ANDROID ?= 0
IS_ARM_EMBEDDED ?= 0

# Clang is reporting armv8l-unknown-linux-gnueabihf
# for ARMv7 images on Aarch64 hardware.
MACHINEX := $(shell $(CXX) $(CXXFLAGS) -dumpmachine 2>/dev/null)
HOSTX := $(shell echo $(MACHINEX) | cut -f 1 -d '-')
ifeq ($(HOSTX),)
  HOSTX := $(shell uname -m 2>/dev/null)
endif

IS_LINUX := $(shell echo $(MACHINEX) | $(GREP) -i -c "Linux")

# Can be used by Android and Embeeded cross-compiles. Disable by default because
#   Android and embedded users typically don't run this configuration.
HAS_SOLIB_VERSION ?= 0

# Formely adhoc.cpp was created from adhoc.cpp.proto when needed.
# This is now needed because ISA tests are performed using adhoc.cpp.
ifeq ($(wildcard adhoc.cpp),)
$(shell cp adhoc.cpp.proto adhoc.cpp)
endif

###########################################################
#####                General Variables                #####
###########################################################

# Default prefix for make install
ifeq ($(PREFIX),)
PREFIX = /usr/local
endif

# http://www.gnu.org/prep/standards/html_node/Directory-Variables.html
ifeq ($(DATADIR),)
DATADIR := $(PREFIX)/share
endif
ifeq ($(LIBDIR),)
LIBDIR := $(PREFIX)/lib
endif
ifeq ($(BINDIR),)
BINDIR := $(PREFIX)/bin
endif
ifeq ($(INCLUDEDIR),)
INCLUDEDIR := $(PREFIX)/include
endif

# We honor ARFLAGS, but the "v" option used by default causes a noisy make
ifeq ($(ARFLAGS),rv)
  ARFLAGS = r
endif

# Sadly, we can't actually use GCC_PRAGMA_AWARE because of GCC bug 53431.
# Its a shame because GCC has so much to offer by the way of analysis.
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53431
ifneq ($(CLANG_COMPILER),0)
  CXXFLAGS += -Wall
endif

###########################################################
#####                       iOS                       #####
###########################################################

# iOS cross-compile configuration.
#   See http://www.cryptopp.com/wiki/iOS_(Command_Line).
ifeq ($(IS_IOS),1)
  CXXFLAGS += $(IOS_CXXFLAGS) -stdlib=libc++
  CXXFLAGS += --sysroot "$(IOS_SYSROOT)"

  AR = libtool
  ARFLAGS = -static -o
endif

###########################################################
#####                     Android                     #####
###########################################################

# Android cross-compile configuration.
#   See http://www.cryptopp.com/wiki/Android_(Command_Line).
ifeq ($(IS_ANDROID),1)
  CXXFLAGS += $(ANDROID_CXXFLAGS) -D__ANDROID_API__=$(ANDROID_API)
  CXXFLAGS += --sysroot=$(ANDROID_SYSROOT)
  CXXFLAGS += -Wa,--noexecstack

  # Source files copied into PWD for Android cpu-features
  # setenv-android.sh does the copying. Its a dirty compile.
  ANDROID_CPU_OBJ = cpu-features.o
endif

###########################################################
#####                    Embedded                     #####
###########################################################

# ARM embedded cross-compile configuration.
#   See http://www.cryptopp.com/wiki/ARM_Embedded_(Command_Line)
#   and http://www.cryptopp.com/wiki/ARM_Embedded_(Bare Metal).
ifeq ($(IS_ARM_EMBEDDED),1)
  # CPP, CXX, AR, RANLIB, LD, etc are set in 'setenv-embedded.sh'
  CXXFLAGS += $(ARM_EMBEDDED_FLAGS) --sysroot=$(ARM_EMBEDDED_SYSROOT)
endif

###########################################################
#####              Compiler and Platform              #####
###########################################################

# Wait until CXXFLAGS have been set by setenv scripts.

GCC_COMPILER := $(shell $(CXX) --version 2>/dev/null | $(GREP) -v -E 'llvm|clang' | $(GREP) -i -c -E '(gcc|g\+\+)')
CLANG_COMPILER := $(shell $(CXX) --version 2>/dev/null | $(GREP) -i -c -E 'llvm|clang')

HOSTX := $(shell $(CXX) $(CXXFLAGS) -dumpmachine 2>/dev/null | cut -f 1 -d '-')
ifeq ($(HOSTX),)
  HOSTX := $(shell uname -m 2>/dev/null)
endif

# This dance is because Clang reports the host architecture instead
# of the target architecture. Running Clang on an x86_64 machine with
# -arch arm64 yields x86_64 instead of aarch64 or arm64.

ifeq ($(CLANG_COMPILER),1)
  IS_X86 := $(shell echo $(CXXFLAGS) | $(GREP) -v 64 | $(GREP) -i -c -E 'i.86')
  IS_X64 := $(shell echo $(CXXFLAGS) | $(GREP) -i -c -E 'x86_64|amd64')
  IS_ARM32 := $(shell echo $(CXXFLAGS) | $(GREP) -v 64 | $(GREP) -i -c -E 'arm|armhf|arm7l|eabihf')
  IS_ARMV8 := $(shell echo $(CXXFLAGS) | $(GREP) -i -c -E 'aarch32|aarch64|arm64|armv8')
else
  IS_X86 := $(shell echo $(HOSTX) | $(GREP) -v 64 | $(GREP) -i -c -E 'i.86')
  IS_X64 := $(shell echo $(HOSTX) | $(GREP) -i -c -E 'x86_64|amd64')
  IS_ARM32 := $(shell echo $(HOSTX) | $(GREP) -v 64 | $(GREP) -i -c -E 'arm|armhf|arm7l|eabihf')
  IS_ARMV8 := $(shell echo $(HOSTX) | $(GREP) -i -c -E 'aarch32|aarch64|arm64|armv8')
endif

ifeq ($(IS_ARMV8),1)
  IS_ARM32 = 0
endif

IS_X32 := 0
IS_PPC32 := 0
IS_PPC64 := 0

$(info Here's what we found... IS_X86: $(IS_X86), IS_X64: $(IS_X64), IS_ARM32: $(IS_ARM32), IS_ARMV8: $(IS_ARMV8))

###########################################################
#####                  Test Program                   #####
###########################################################

# Hack to skip CPU feature tests for some recipes
DETECT_FEATURES ?= 1
ifeq ($(findstring -DCRYPTOPP_DISABLE_ASM,$(CXXFLAGS)),-DCRYPTOPP_DISABLE_ASM)
  DETECT_FEATURES := 0
else ifeq ($(findstring clean,$(MAKECMDGOALS)),clean)
  DETECT_FEATURES := 0
else ifeq ($(findstring distclean,$(MAKECMDGOALS)),distclean)
  DETECT_FEATURES := 0
else ifeq ($(findstring distclean,$(MAKECMDGOALS)),trim)
  DETECT_FEATURES := 0
else ifeq ($(IS_IOS),1)
  DETECT_FEATURES := 0
endif

# Strip out -Wall, -Wextra and friends for feature testing. FORTIFY_SOURCE is removed
# because it requires -O1 or higher, but we use -O0 to tame the optimizer.
ifeq ($(DETECT_FEATURES),1)
  TCXXFLAGS := $(filter-out -D_FORTIFY_SOURCE=% -M -MM -Wall -Wextra -Werror% -Wunused -Wconversion -Wp%, $(CXXFLAGS))
  ifneq ($(strip $(TCXXFLAGS)),)
    $(info Using testing flags: $(TCXXFLAGS))
  endif
  #TPROG = TestPrograms/test_cxx.cxx
  #$(info Testing compile... )
  #$(info $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 1>/dev/null))
endif

# For the previous messages
$(info )

###########################################################
#####               X86/X32/X64 Options               #####
###########################################################

ifneq ($(IS_X86)$(IS_X64),00)
ifeq ($(DETECT_FEATURES),1)

  SSE2_FLAG = -msse2
  SSE3_FLAG = -msse3
  SSSE3_FLAG = -mssse3
  SSE41_FLAG = -msse4.1
  SSE42_FLAG = -msse4.2
  CLMUL_FLAG = -mpclmul
  AESNI_FLAG = -maes
  AVX_FLAG = -mavx
  AVX2_FLAG = -mavx2
  SHANI_FLAG = -msha

  TPROG = TestPrograms/test_x86_sse2.cxx
  TOPT = $(SSE2_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    CHACHA_FLAG = $(SSE2_FLAG)
  else
    SSE2_FLAG =
  endif

  TPROG = TestPrograms/test_x86_ssse3.cxx
  TOPT = $(SSSE3_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    ARIA_FLAG = $(SSSE3_FLAG)
    CHAM_FLAG = $(SSSE3_FLAG)
    LEA_FLAG = $(SSSE3_FLAG)
    SIMECK_FLAG = $(SSSE3_FLAG)
    SIMON128_FLAG = $(SSSE3_FLAG)
    SPECK128_FLAG = $(SSSE3_FLAG)
  else
    SSSE3_FLAG =
  endif

  TPROG = TestPrograms/test_x86_sse41.cxx
  TOPT = $(SSE41_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    BLAKE2B_FLAG = $(SSE41_FLAG)
    BLAKE2S_FLAG = $(SSE41_FLAG)
    SIMON64_FLAG = $(SSE41_FLAG)
    SPECK64_FLAG = $(SSE41_FLAG)
  else
    SSE41_FLAG =
  endif

  TPROG = TestPrograms/test_x86_sse42.cxx
  TOPT = $(SSE42_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    CRC_FLAG = $(SSE42_FLAG)
  else
    SSE42_FLAG =
  endif

  TPROG = TestPrograms/test_x86_clmul.cxx
  TOPT = $(CLMUL_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    GCM_FLAG = $(SSSE3_FLAG) $(CLMUL_FLAG)
  else
    CLMUL_FLAG =
  endif

  TPROG = TestPrograms/test_x86_aes.cxx
  TOPT = $(AESNI_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    AES_FLAG = $(SSE41_FLAG) $(AESNI_FLAG)
    SM4_FLAG = $(SSSE3_FLAG) $(AESNI_FLAG)
  else
    AESNI_FLAG =
  endif

  TPROG = TestPrograms/test_x86_avx.cxx
  TOPT = $(AVX_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    # XXX_FLAG = $(AVX_FLAG)
  else
    AVX_FLAG =
  endif

  TPROG = TestPrograms/test_x86_avx2.cxx
  TOPT = $(AVX2_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    CHACHA_AVX2_FLAG = $(AVX2_FLAG)
  else
    AVX2_FLAG =
  endif

  TPROG = TestPrograms/test_x86_sha.cxx
  TOPT = $(SHANI_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    SHA_FLAG = $(SSE42_FLAG) $(SHANI_FLAG)
  else
    SHANI_FLAG =
  endif

  ifeq ($(SSE2_FLAG),)
    CXXFLAGS += -DCRYPTOPP_DISABLE_ASM
  else ifeq ($(SSE3_FLAG),)
    CXXFLAGS += -DCRYPTOPP_DISABLE_SSE3
  else ifeq ($(SSSE3_FLAG),)
    CXXFLAGS += -DCRYPTOPP_DISABLE_SSSE3
  else ifeq ($(SSE41_FLAG),)
    CXXFLAGS += -DCRYPTOPP_DISABLE_SSE4
  else ifeq ($(SSE42_FLAG),)
    CXXFLAGS += -DCRYPTOPP_DISABLE_SSE4
  endif

  ifneq ($(SSE42_FLAG),)

    # Unusual GCC/Clang on Macports. It assembles AES, but not CLMUL.
    # test_x86_clmul.s:15: no such instruction: 'pclmulqdq $0, %xmm1,%xmm0'
    ifeq ($(CLMUL_FLAG),)
      CXXFLAGS += -DCRYPTOPP_DISABLE_CLMUL
    endif
    ifeq ($(AESNI_FLAG),)
      CXXFLAGS += -DCRYPTOPP_DISABLE_AESNI
    endif

    ifeq ($(AVX_FLAG),)
      CXXFLAGS += -DCRYPTOPP_DISABLE_AVX
    else ifeq ($(AVX2_FLAG),)
      CXXFLAGS += -DCRYPTOPP_DISABLE_AVX2
    else ifeq ($(SHANI_FLAG),)
      CXXFLAGS += -DCRYPTOPP_DISABLE_SHANI
    endif
  endif

  # Drop to SSE2 if available
  ifeq ($(GCM_FLAG),)
    ifneq ($(SSE2_FLAG),)
      GCM_FLAG = $(SSE2_FLAG)
    endif
  endif

  # Most Clang cannot handle mixed asm with positional arguments, where the
  # body is Intel style with no prefix and the templates are AT&T style.
  # Also see https://bugs.llvm.org/show_bug.cgi?id=39895 .

  # CRYPTOPP_DISABLE_MIXED_ASM is now being added in config_asm.h for all
  # Clang compilers. This test will need to be re-enabled if Clang fixes it.
  #TPROG = TestPrograms/test_asm_mixed.cxx
  #HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  #ifneq ($(strip $(HAVE_OPT)),0)
  #  CXXFLAGS += -DCRYPTOPP_DISABLE_MIXED_ASM
  #endif

# DETECT_FEATURES
endif

# IS_X86, IS_X32 and IS_X64
endif

###########################################################
#####                ARM A-32 and NEON                #####
###########################################################

ifneq ($(IS_ARM32),0)
ifeq ($(DETECT_FEATURES),1)

  # Android needs -c compile flag for NEON. Otherwise there's an odd linker message.
  ifeq ($(IS_ANDROID),1)
    NEON_FLAG = -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp -mfpu=neon
  else
    NEON_FLAG = -march=armv7-a -mfloat-abi=$(FP_ABI) -mfpu=neon
  endif

  TPROG = TestPrograms/test_arm_neon.cxx
  TOPT = $(NEON_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    ARIA_FLAG = $(NEON_FLAG)
    AES_FLAG = $(NEON_FLAG)
    CRC_FLAG = $(NEON_FLAG)
    GCM_FLAG = $(NEON_FLAG)
    BLAKE2B_FLAG = $(NEON_FLAG)
    BLAKE2S_FLAG = $(NEON_FLAG)
    CHACHA_FLAG = $(NEON_FLAG)
    CHAM_FLAG = $(NEON_FLAG)
    LEA_FLAG = $(NEON_FLAG)
    SHA_FLAG = $(NEON_FLAG)
    SIMECK_FLAG = $(NEON_FLAG)
    SIMON64_FLAG = $(NEON_FLAG)
    SIMON128_FLAG = $(NEON_FLAG)
    SPECK64_FLAG = $(NEON_FLAG)
    SPECK128_FLAG = $(NEON_FLAG)
    SM4_FLAG = $(NEON_FLAG)
  else
    NEON_FLAG =
    CXXFLAGS += -DCRYPTOPP_DISABLE_ASM
  endif

# DETECT_FEATURES
endif
# IS_ARM32
endif

###########################################################
#####                Aach32 and Aarch64               #####
###########################################################

ifneq ($(IS_ARMV8),0)
ifeq ($(DETECT_FEATURES),1)

  ifeq ($(IS_IOS),1)
    ASIMD_FLAG =
    CRC_FLAG =
    AES_FLAG =
    PMUL_FLAG =
    SHA_FLAG =
  else
    ASIMD_FLAG = -march=armv8-a
    CRC_FLAG = -march=armv8-a+crc
    AES_FLAG = -march=armv8-a+crypto
    PMULL_FLAG = -march=armv8-a+crypto
    SHA_FLAG = -march=armv8-a+crypto
  endif

  TPROG = TestPrograms/test_arm_acle.cxx
  TOPT = $(ASIMD_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    ACLE_FLAG += -DCRYPTOPP_ARM_ACLE_HEADER=1
  else
    CXXFLAGS += -DCRYPTOPP_ARM_ACLE_HEADER=0
  endif

  TPROG = TestPrograms/test_arm_asimd.cxx
  TOPT = $(ASIMD_FLAG)
  HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
  ifeq ($(strip $(HAVE_OPT)),0)
    ARIA_FLAG = $(ASIMD_FLAG)
    BLAKE2B_FLAG = $(ASIMD_FLAG)
    BLAKE2S_FLAG = $(ASIMD_FLAG)
    CHACHA_FLAG = $(ASIMD_FLAG)
    CHAM_FLAG = $(ASIMD_FLAG)
    LEA_FLAG = $(ASIMD_FLAG)
    NEON_FLAG = $(ASIMD_FLAG)
    SIMECK_FLAG = $(ASIMD_FLAG)
    SIMON64_FLAG = $(ASIMD_FLAG)
    SIMON128_FLAG = $(ASIMD_FLAG)
    SPECK64_FLAG = $(ASIMD_FLAG)
    SPECK128_FLAG = $(ASIMD_FLAG)
    SM4_FLAG = $(ASIMD_FLAG)
  else
    ASIMD_FLAG =
    CXXFLAGS += -DCRYPTOPP_DISABLE_ASM
  endif

    TPROG = TestPrograms/test_arm_crc.cxx
    TOPT = $(CRC_FLAG)
    HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
    ifneq ($(strip $(HAVE_OPT)),0)
      CRC_FLAG =
      CXXFLAGS += -DCRYPTOPP_ARM_CRC32_AVAILABLE=0
    endif

    TPROG = TestPrograms/test_arm_aes.cxx
    TOPT = $(AES_FLAG)
    HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
    ifneq ($(strip $(HAVE_OPT)),0)
      AES_FLAG =
      CXXFLAGS += -DCRYPTOPP_ARM_AES_AVAILABLE=0
    endif

    TPROG = TestPrograms/test_arm_pmull.cxx
    TOPT = $(PMULL_FLAG)
    HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
    ifneq ($(strip $(HAVE_OPT)),0)
      PMULL_FLAG =
      CXXFLAGS += -DCRYPTOPP_ARM_PMULL_AVAILABLE=0
    endif

    TPROG = TestPrograms/test_arm_sha1.cxx
    TOPT = $(SHA_FLAG)
    HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
    ifneq ($(strip $(HAVE_OPT)),0)
      SHA_FLAG =
      CXXFLAGS += -DCRYPTOPP_ARM_SHA_AVAILABLE=0
    endif

    TPROG = TestPrograms/test_arm_sm3.cxx
    TOPT = -march=armv8.4-a+crypto
    HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
    ifeq ($(strip $(HAVE_OPT)),0)
      SM3_FLAG = -march=armv8.4-a+crypto
      SM4_FLAG = -march=armv8.4-a+crypto
    endif

    TPROG = TestPrograms/test_arm_sha3.cxx
    TOPT = -march=armv8.4-a+crypto
    HAVE_OPT = $(shell $(CXX) $(TCXXFLAGS) $(ACLE_FLAG) $(ZOPT) $(TOPT) $(TPROG) -o $(TOUT) 2>&1 | tr ' ' '\n' | wc -l)
    ifeq ($(strip $(HAVE_OPT)),0)
      SHA3_FLAG = -march=armv8.4-a+crypto
      SHA512_FLAG = -march=armv8.4-a+crypto
    endif

# DETECT_FEATURES
endif
# IS_ARMV8
endif

###########################################################
#####                      Common                     #####
###########################################################

# No ASM for Travis testing
ifeq ($(findstring no-asm,$(MAKECMDGOALS)),no-asm)
  ifeq ($(findstring -DCRYPTOPP_DISABLE_ASM,$(CXXFLAGS)),)
    CXXFLAGS += -DCRYPTOPP_DISABLE_ASM
  endif # CXXFLAGS
endif # No ASM

# Undefined Behavior Sanitizer (UBsan) testing. Issue 'make ubsan'.
ifeq ($(findstring ubsan,$(MAKECMDGOALS)),ubsan)
  ifeq ($(findstring -fsanitize=undefined,$(CXXFLAGS)),)
    CXXFLAGS += -fsanitize=undefined
  endif # CXXFLAGS
  ifeq ($(findstring -DCRYPTOPP_COVERAGE,$(CXXFLAGS)),)
    CXXFLAGS += -DCRYPTOPP_COVERAGE
  endif # CXXFLAGS
endif # UBsan

# Address Sanitizer (Asan) testing. Issue 'make asan'.
ifeq ($(findstring asan,$(MAKECMDGOALS)),asan)
  ifeq ($(findstring -fsanitize=address,$(CXXFLAGS)),)
    CXXFLAGS += -fsanitize=address
  endif # CXXFLAGS
  ifeq ($(findstring -DCRYPTOPP_COVERAGE,$(CXXFLAGS)),)
    CXXFLAGS += -DCRYPTOPP_COVERAGE
  endif # CXXFLAGS
  ifeq ($(findstring -fno-omit-frame-pointer,$(CXXFLAGS)),)
    CXXFLAGS += -fno-omit-frame-pointer
  endif # CXXFLAGS
endif # Asan

# LD gold linker testing. Triggered by 'LD=ld.gold'.
ifeq ($(findstring ld.gold,$(LD)),ld.gold)
  ifeq ($(findstring -fuse-ld=gold,$(CXXFLAGS)),)
    ELF_FORMAT := $(shell file `which ld.gold` 2>&1 | cut -d":" -f 2 | $(GREP) -i -c "elf")
    ifneq ($(ELF_FORMAT),0)
      LDFLAGS += -fuse-ld=gold
    endif # ELF/ELF64
  endif # CXXFLAGS
endif # Gold

# Valgrind testing. Issue 'make valgrind'.
ifneq ($(filter valgrind,$(MAKECMDGOALS)),)
  # Tune flags; see http://valgrind.org/docs/manual/quick-start.html
  CXXFLAGS := $(CXXFLAGS:-g%=-g3)
  CXXFLAGS := $(CXXFLAGS:-O%=-O1)
  CXXFLAGS := $(CXXFLAGS:-xO%=-xO1)
  ifeq ($(findstring -DCRYPTOPP_COVERAGE,$(CXXFLAGS)),)
    CXXFLAGS += -DCRYPTOPP_COVERAGE
  endif # -DCRYPTOPP_COVERAGE
endif # Valgrind

# Debug testing on GNU systems. Triggered by -DDEBUG.
#   Newlib test due to http://sourceware.org/bugzilla/show_bug.cgi?id=20268
ifneq ($(filter -DDEBUG -DDEBUG=1,$(CXXFLAGS)),)
  USING_GLIBCXX := $(shell $(CXX) $(CXXFLAGS) -E pch.cpp 2>&1 | $(GREP) -i -c "__GLIBCXX__")
  ifneq ($(USING_GLIBCXX),0)
    ifeq ($(HAS_NEWLIB),0)
      ifeq ($(findstring -D_GLIBCXX_DEBUG,$(CXXFLAGS)),)
        CXXFLAGS += -D_GLIBCXX_DEBUG
      endif # CXXFLAGS
    endif # HAS_NEWLIB
  endif # USING_GLIBCXX
endif # GNU Debug build

# Dead code stripping. Issue 'make lean'.
ifeq ($(findstring lean,$(MAKECMDGOALS)),lean)
  ifeq ($(findstring -ffunction-sections,$(CXXFLAGS)),)
    CXXFLAGS += -ffunction-sections
  endif # CXXFLAGS
  ifeq ($(findstring -fdata-sections,$(CXXFLAGS)),)
    CXXFLAGS += -fdata-sections
  endif # CXXFLAGS
  ifneq ($(IS_IOS),0)
    ifeq ($(findstring -Wl,-dead_strip,$(LDFLAGS)),)
      LDFLAGS += -Wl,-dead_strip
    endif # CXXFLAGS
  else # BSD, Linux and Unix
    ifeq ($(findstring -Wl,--gc-sections,$(LDFLAGS)),)
      LDFLAGS += -Wl,--gc-sections
    endif # LDFLAGS
  endif # MAKECMDGOALS
endif # Dead code stripping

###########################################################
#####              Source and object files            #####
###########################################################

# List cryptlib.cpp first, then cpu.cpp, then integer.cpp to tame C++ static initialization problems.
SRCS := cryptlib.cpp cpu.cpp integer.cpp $(filter-out cryptlib.cpp cpu.cpp integer.cpp pch.cpp simple.cpp,$(sort $(wildcard *.cpp)))
# For Makefile.am; resource.h is Windows
INCL := $(filter-out resource.h,$(sort $(wildcard *.h)))

# Cryptogams source files. We couple to ARMv7.
# Limit to Linux. The source files target the GNU assembler.
# Also see https://www.cryptopp.com/wiki/Cryptogams.
ifeq ($(IS_ARM32)$(IS_LINUX),11)
  ifeq ($(CLANG_COMPILER),1)
    CRYPTOGAMS_ARMV7_FLAG = -march=armv7-a -Wa,--noexecstack
    CRYPTOGAMS_ARMV7_THUMB_FLAG = -march=armv7-a -mthumb -Wa,--noexecstack
  else
    CRYPTOGAMS_ARMV7_FLAG = -march=armv7-a -Wa,--noexecstack
    CRYPTOGAMS_ARMV7_THUMB_FLAG = -march=armv7-a -Wa,--noexecstack
  endif
  SRCS += aes_armv4.S sha1_armv4.S sha256_armv4.S sha512_armv4.S
endif

# Remove unneeded arch specific files to speed build time.
ifeq ($(IS_PPC32)$(IS_PPC64),00)
  SRCS := $(filter-out ppc_%,$(SRCS))
endif
ifeq ($(IS_ARM32)$(IS_ARMV8),00)
  SRCS := $(filter-out arm_%,$(SRCS))
  SRCS := $(filter-out neon_%,$(SRCS))
endif
ifeq ($(IS_X86)$(IS_X32)$(IS_X64),000)
  SRCS := $(filter-out sse_%,$(SRCS))
endif

# List cryptlib.cpp first, then cpu.cpp, then integer.cpp to tame C++ static initialization problems.
OBJS := $(SRCS:.cpp=.o)
OBJS := $(OBJS:.S=.o)

# List test.cpp first to tame C++ static initialization problems.
TESTSRCS := adhoc.cpp test.cpp bench1.cpp bench2.cpp bench3.cpp datatest.cpp dlltest.cpp fipsalgt.cpp validat0.cpp validat1.cpp validat2.cpp validat3.cpp validat4.cpp validat5.cpp validat6.cpp validat7.cpp validat8.cpp validat9.cpp validat10.cpp regtest1.cpp regtest2.cpp regtest3.cpp regtest4.cpp
TESTINCL := bench.h factory.h validate.h

# Test objects
TESTOBJS := $(TESTSRCS:.cpp=.o)
LIBOBJS := $(filter-out $(TESTOBJS),$(OBJS))

# For Shared Objects, Diff, Dist/Zip rules
LIB_VER := $(shell $(GREP) "define CRYPTOPP_VERSION" config_ver.h | cut -d" " -f 3)
LIB_MAJOR := $(shell echo $(LIB_VER) | cut -c 1)
LIB_MINOR := $(shell echo $(LIB_VER) | cut -c 2)
LIB_PATCH := $(shell echo $(LIB_VER) | cut -c 3)

ifeq ($(strip $(LIB_PATCH)),)
LIB_PATCH := 0
endif

ifeq ($(HAS_SOLIB_VERSION),1)
# Full version suffix for shared library
SOLIB_VERSION_SUFFIX=.$(LIB_MAJOR).$(LIB_MINOR).$(LIB_PATCH)
# Different patchlevels and minors are compatible since 6.1
SOLIB_COMPAT_SUFFIX=.$(LIB_MAJOR)
SOLIB_FLAGS=-Wl,-soname,libcryptopp.so$(SOLIB_COMPAT_SUFFIX)
endif # HAS_SOLIB_VERSION

###########################################################
#####                Targets and Recipes              #####
###########################################################

# Default builds program with static library only
.PHONY: default
default: cryptest.exe

.PHONY: all static dynamic
all: static dynamic cryptest.exe

ifneq ($(IS_IOS),0)
static: libcryptopp.a
shared dynamic dylib: libcryptopp.dylib
else
static: libcryptopp.a
shared dynamic: libcryptopp.so$(SOLIB_VERSION_SUFFIX)
endif

.PHONY: test check
test check: cryptest.exe
	./cryptest.exe v

# CXXFLAGS are tuned earlier. Applications must use linker flags
#  -Wl,--gc-sections (Linux and Unix) or -Wl,-dead_strip (OS X)
.PHONY: lean
lean: static dynamic cryptest.exe

.PHONY: clean
clean:
	-$(RM) adhoc.cpp.o adhoc.cpp.proto.o $(LIBOBJS) $(ANDROID_CPU_OBJ) rdrand-*.o $(TESTOBJS) $(DLLOBJS) $(LIBIMPORTOBJS) $(TESTIMPORTOBJS) $(DLLTESTOBJS)
	@-$(RM) libcryptopp.a libcryptopp.dylib cryptopp.dll libcryptopp.dll.a libcryptopp.import.a
	@-$(RM) libcryptopp.so libcryptopp.so$(SOLIB_COMPAT_SUFFIX) libcryptopp.so$(SOLIB_VERSION_SUFFIX)
	@-$(RM) cryptest.exe dlltest.exe cryptest.import.exe cryptest.info ct et
	@-$(RM) *.la *.lo *.gcov *.gcno *.gcda *.stackdump core core-*
	@-$(RM) /tmp/adhoc.exe
	@-$(RM) -r /tmp/cryptopp_test/
	@-$(RM) -r *.exe.dSYM/
	@-$(RM) -r *.dylib.dSYM/
	@-$(RM) -r cov-int/

.PHONY: autotools-clean
autotools-clean:
	@-$(RM) -f configure.ac configure configure.in Makefile.am Makefile.in Makefile
	@-$(RM) -f config.guess config.status config.sub config.h.in compile depcomp
	@-$(RM) -f install-sh stamp-h1 ar-lib *.lo *.la *.m4 local.* lt*.sh missing
	@-$(RM) -f cryptest cryptestcwd libtool* libcryptopp.la libcryptopp.pc*
	@-$(RM) -rf m4/ auto*.cache/ .deps/ .libs/

.PHONY: cmake-clean
cmake-clean:
	@-$(RM) -f cryptopp-config.cmake CMakeLists.txt
	@-$(RM) -rf cmake_build/

.PHONY: android-clean
android-clean:
	@-$(RM) -f $(patsubst %_simd.cpp,%_simd.cpp.neon,$(wildcard *_simd.cpp))
	@-$(RM) -rf obj/

.PHONY: distclean
distclean: clean autotools-clean cmake-clean android-clean
	-$(RM) adhoc.cpp adhoc.cpp.copied GNUmakefile.deps benchmarks.html cryptest.txt
	@-$(RM) cryptest-*.txt cryptopp.tgz libcryptopp.pc *.o *.bc *.ii *~
	@-$(RM) -r cryptlib.lib cryptest.exe *.suo *.sdf *.pdb Win32/ x64/ ipch/
	@-$(RM) -r $(LIBOBJS:.o=.obj) $(TESTOBJS:.o=.obj)
	@-$(RM) -r $(LIBOBJS:.o=.lst) $(TESTOBJS:.o=.lst)
	@-$(RM) -r TestCoverage/ ref*/
	@-$(RM) cryptopp$(LIB_VER)\.* CryptoPPRef.zip

# Install cryptest.exe, libcryptopp.a and libcryptopp.so.
# The library install was broken-out into its own recipe at GH #653.
.PHONY: install
install: cryptest.exe install-lib
	@-$(MKDIR) $(DESTDIR)$(BINDIR)
	$(CP) cryptest.exe $(DESTDIR)$(BINDIR)
	$(CHMOD) 0755 $(DESTDIR)$(BINDIR)/cryptest.exe
	@-$(MKDIR) $(DESTDIR)$(DATADIR)/cryptopp/TestData
	@-$(MKDIR) $(DESTDIR)$(DATADIR)/cryptopp/TestVectors
	$(CP) TestData/*.dat $(DESTDIR)$(DATADIR)/cryptopp/TestData
	$(CHMOD) 0644 $(DESTDIR)$(DATADIR)/cryptopp/TestData/*.dat
	$(CP) TestVectors/*.txt $(DESTDIR)$(DATADIR)/cryptopp/TestVectors
	$(CHMOD) 0644 $(DESTDIR)$(DATADIR)/cryptopp/TestVectors/*.txt

# A recipe to install only the library, and not cryptest.exe. Also
# see https://github.com/weidai11/cryptopp/issues/653.
.PHONY: install-lib
install-lib:
	@-$(MKDIR) $(DESTDIR)$(INCLUDEDIR)/cryptopp
	$(CP) *.h $(DESTDIR)$(INCLUDEDIR)/cryptopp
	$(CHMOD) 0644 $(DESTDIR)$(INCLUDEDIR)/cryptopp/*.h
ifneq ($(wildcard libcryptopp.a),)
	@-$(MKDIR) $(DESTDIR)$(LIBDIR)
	$(CP) libcryptopp.a $(DESTDIR)$(LIBDIR)
	$(CHMOD) 0644 $(DESTDIR)$(LIBDIR)/libcryptopp.a
endif
ifneq ($(wildcard libcryptopp.dylib),)
	@-$(MKDIR) $(DESTDIR)$(LIBDIR)
	$(CP) libcryptopp.dylib $(DESTDIR)$(LIBDIR)
	$(CHMOD) 0755 $(DESTDIR)$(LIBDIR)/libcryptopp.dylib
	-install_name_tool -id $(DESTDIR)$(LIBDIR)/libcryptopp.dylib $(DESTDIR)$(LIBDIR)/libcryptopp.dylib
endif
ifneq ($(wildcard libcryptopp.so$(SOLIB_VERSION_SUFFIX)),)
	@-$(MKDIR) $(DESTDIR)$(LIBDIR)
	$(CP) libcryptopp.so$(SOLIB_VERSION_SUFFIX) $(DESTDIR)$(LIBDIR)
	$(CHMOD) 0755 $(DESTDIR)$(LIBDIR)/libcryptopp.so$(SOLIB_VERSION_SUFFIX)
ifeq ($(HAS_SOLIB_VERSION),1)
	-$(LN) libcryptopp.so$(SOLIB_VERSION_SUFFIX) $(DESTDIR)$(LIBDIR)/libcryptopp.so
	$(LDCONF) $(DESTDIR)$(LIBDIR)
endif
endif
ifneq ($(wildcard libcryptopp.pc),)
	@-$(MKDIR) $(DESTDIR)$(LIBDIR)/pkgconfig
	$(CP) libcryptopp.pc $(DESTDIR)$(LIBDIR)/pkgconfig
	$(CHMOD) 0644 $(DESTDIR)$(LIBDIR)/pkgconfig/libcryptopp.pc
endif

.PHONY: remove uninstall
remove uninstall:
	-$(RM) -r $(DESTDIR)$(INCLUDEDIR)/cryptopp
	-$(RM) $(DESTDIR)$(LIBDIR)/libcryptopp.a
	-$(RM) $(DESTDIR)$(BINDIR)/cryptest.exe
	@-$(RM) $(DESTDIR)$(LIBDIR)/libcryptopp.dylib
	@-$(RM) $(DESTDIR)$(LIBDIR)/libcryptopp.so$(SOLIB_VERSION_SUFFIX)
	@-$(RM) $(DESTDIR)$(LIBDIR)/libcryptopp.so$(SOLIB_COMPAT_SUFFIX)
	@-$(RM) $(DESTDIR)$(LIBDIR)/libcryptopp.so

libcryptopp.a: $(LIBOBJS) $(ANDROID_CPU_OBJ)
	$(AR) $(ARFLAGS) $@ $(LIBOBJS) $(ANDROID_CPU_OBJ)
	$(RANLIB) $@

ifeq ($(HAS_SOLIB_VERSION),1)
.PHONY: libcryptopp.so
libcryptopp.so: libcryptopp.so$(SOLIB_VERSION_SUFFIX)
endif

libcryptopp.so$(SOLIB_VERSION_SUFFIX): $(LIBOBJS) $(ANDROID_CPU_OBJ)
	$(CXX) -shared $(SOLIB_FLAGS) -o $@ $(strip $(CXXFLAGS)) -Wl,--exclude-libs,ALL $(LIBOBJS) $(ANDROID_CPU_OBJ) $(LDFLAGS) $(LDLIBS)
ifeq ($(HAS_SOLIB_VERSION),1)
	-$(LN) libcryptopp.so$(SOLIB_VERSION_SUFFIX) libcryptopp.so
	-$(LN) libcryptopp.so$(SOLIB_VERSION_SUFFIX) libcryptopp.so$(SOLIB_COMPAT_SUFFIX)
endif

libcryptopp.dylib: $(LIBOBJS)
	$(CXX) -dynamiclib -o $@ $(strip $(CXXFLAGS)) -install_name "$@" -current_version "$(LIB_MAJOR).$(LIB_MINOR).$(LIB_PATCH)" -compatibility_version "$(LIB_MAJOR).$(LIB_MINOR)" -headerpad_max_install_names $(LDFLAGS) $(LIBOBJS)

cryptest.exe: $(LINK_LIBRARY) $(TESTOBJS)
	$(CXX) -o $@ $(strip $(CXXFLAGS)) $(TESTOBJS) $(LINK_LIBRARY_PATH)$(LINK_LIBRARY) $(LDFLAGS) $(LDLIBS)

# Used to generate list of source files for Autotools, CMakeList and Android.mk
.PHONY: sources
sources:
	$(info ***** Library sources *****)
	$(info $(filter-out $(TESTSRCS),$(SRCS)))
	$(info )
	$(info ***** Library headers *****)
	$(info $(filter-out $(TESTINCL),$(INCL)))
	$(info )
	$(info ***** Test sources *****)
	$(info $(TESTSRCS))
	$(info )
	$(info ***** Test headers *****)
	$(info $(TESTINCL))

adhoc.cpp: adhoc.cpp.proto
ifeq ($(wildcard adhoc.cpp),)
	cp adhoc.cpp.proto adhoc.cpp
else
	touch adhoc.cpp
endif

# Include dependencies, if present. You must issue `make deps` to create them.
ifeq ($(wildcard GNUmakefile.deps),GNUmakefile.deps)
-include GNUmakefile.deps
endif # Dependencies

# Cryptogams ARM asm implementation. AES needs -mthumb for Clang
aes_armv4.o : aes_armv4.S
	$(CXX) $(strip $(CXXFLAGS) $(CRYPTOGAMS_ARMV7_THUMB_FLAG) -c) $<

# Use C++ compiler on C source after patching.
# https://github.com/weidai11/cryptopp/issues/926
cpu-features.o: cpu-features.h cpu-features.c
	$(CXX) -x c $(strip $(CXXFLAGS) -c) cpu-features.c

# SSSE3 or NEON available
aria_simd.o : aria_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(ARIA_FLAG) -c) $<

# SSE, NEON or POWER7 available
blake2s_simd.o : blake2s_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(BLAKE2S_FLAG) -c) $<

# SSE, NEON or POWER8 available
blake2b_simd.o : blake2b_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(BLAKE2B_FLAG) -c) $<

# SSE2 or NEON available
chacha_simd.o : chacha_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(CHACHA_FLAG) -c) $<

# AVX2 available
chacha_avx.o : chacha_avx.cpp
	$(CXX) $(strip $(CXXFLAGS) $(CHACHA_AVX2_FLAG) -c) $<

# SSSE3 available
cham_simd.o : cham_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(CHAM_FLAG) -c) $<

# Power9 available
darn.o : darn.cpp
	$(CXX) $(strip $(CXXFLAGS) $(DARN_FLAG) -c) $<

# SSE2 on i686
donna_sse.o : donna_sse.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SSE2_FLAG) -c) $<

# SSE2 on i686
sse_simd.o : sse_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SSE2_FLAG) -c) $<

# SSE4.2 or ARMv8a available
crc_simd.o : crc_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(CRC_FLAG) -c) $<

# PCLMUL or ARMv7a/ARMv8a available
gcm_simd.o : gcm_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(GCM_FLAG) -c) $<

# SSSE3 available
lea_simd.o : lea_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(LEA_FLAG) -c) $<

# NEON available
neon_simd.o : neon_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(NEON_FLAG) -c) $<

# AESNI or ARMv7a/ARMv8a available
rijndael_simd.o : rijndael_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(AES_FLAG) -c) $<

# SSE4.2/SHA-NI or ARMv8a available
sha_simd.o : sha_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SHA_FLAG) -c) $<

# Cryptogams SHA1 asm implementation.
sha1_armv4.o : sha1_armv4.S
	$(CXX) $(strip $(CXXFLAGS) $(CRYPTOGAMS_ARMV7_FLAG) -c) $<

# Cryptogams SHA256 asm implementation.
sha256_armv4.o : sha256_armv4.S
	$(CXX) $(strip $(CXXFLAGS) $(CRYPTOGAMS_ARMV7_FLAG) -c) $<

# Cryptogams SHA512 asm implementation.
sha512_armv4.o : sha512_armv4.S
	$(CXX) $(strip $(CXXFLAGS) $(CRYPTOGAMS_ARMV7_FLAG) -c) $<

# SSE4.2/SHA-NI or ARMv8a available
shacal2_simd.o : shacal2_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SHA_FLAG) -c) $<

# SSSE3 or NEON available
simeck_simd.o : simeck_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SIMECK_FLAG) -c) $<

# SSE4.1, NEON or POWER7 available
simon64_simd.o : simon64_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SIMON64_FLAG) -c) $<

# SSSE3, NEON or POWER8 available
simon128_simd.o : simon128_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SIMON128_FLAG) -c) $<

# SSE4.1, NEON or POWER7 available
speck64_simd.o : speck64_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SPECK64_FLAG) -c) $<

# SSSE3, NEON or POWER8 available
speck128_simd.o : speck128_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SPECK128_FLAG) -c) $<

# ARMv8.4 available
sm3_simd.o : sm3_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SM3_FLAG) -c) $<

# AESNI available
sm4_simd.o : sm4_simd.cpp
	$(CXX) $(strip $(CXXFLAGS) $(SM4_FLAG) -c) $<

%.o : %.cpp
	$(CXX) $(strip $(CXXFLAGS) -c) $<

.PHONY: dep deps depend
dep deps depend GNUmakefile.deps:
	$(CXX) $(strip $(CXXFLAGS)) -MM *.cpp > GNUmakefile.deps