I don't think we are there yet, even with all the patches in the pipeline.

An important test is to create "/home/path/dir with space/" and try to do a complete build in that subdirectory.

An important test is to create "/home/path/dir with space/" and try to do a complete build in that subdirectory.

With a base path /home/path/l in ux cnc:
...
Compiling libnml/inifile/inifile.cc
c++ -c -I. -Ilibnml/linklist -Iemc -Ilibnml/cms -Ilibnml/rcs -Ilibnml/inifile -Ilibnml/os_intf -Ilibnml/nml -Ilibnml/buffer -Ilibnml/posemath -Irtapi -Ihal -Iemc -Iemc/nml_intf -Iemc/kinematics -Iemc/tp -Iemc/motion -Iemc/ini -Iemc -Iemc/rs274ngc -Iemc/sai -Iemc/pythonplugin -Iemc/tooldata -Iemc -I/home/path/l in ux cnc/src/include -I/usr/include/python3.12 -I/usr/include/tirpc -Os -fwrapv -g -Wall -D_FORTIFY_SOURCE=2 -DULAPI -Werror=overloaded-virtual -g -O2 -std=gnu++20 -fPIC
-MP -MD -MF "objects/libnml/inifile/inifile.d" -MT "objects/libnml/inifile/inifile.o"
libnml/inifile/inifile.cc -o objects/libnml/inifile/inifile.o
c++: warning: in: linker input file unused because linking not done
c++: error: in: linker input file not found: No such file or directory
c++: warning: ux: linker input file unused because linking not done
c++: error: ux: linker input file not found: No such file or directory
c++: warning: cnc/src/include: linker input file unused because linking not done
c++: error: cnc/src/include: linker input file not found: No such file or directory
make: *** [Makefile:287: objects/libnml/inifile/inifile.o] Error 1

Looks like some work on LDFLAGS is required. The tests have performed fine, though. The default routines in CI are not creating sub directories, did not want to fiddle too much with it.

It fails on -I/home/path/l in ux cnc/src/include

;) Missed it.

My little test now apparently works. I admit to be slightly surprised. Anyone up for suggestions on how to increase the level of difficulty wrt blanks in the build path?

My little test now apparently works. I admit to be slightly surprised. Anyone up for suggestions on how to increase the level of difficulty wrt blanks in the build path?

I think it would be a good idea to test with the setup in comment #3309 (comment) and (slowly) add fixes until it works properly (do a git clone of the main repo into a directory with spaces).

My little test now apparently works. I admit to be slightly surprised. Anyone up for suggestions on how to increase the level of difficulty wrt blanks in the build path?

I think it would be a good idea to test with the setup in comment #3309 (comment) and (slowly) add fixes until it works properly (do a git clone of the main repo into a directory with spaces).

But isn't exactly that what I have done in https://github.com/smoe/linuxcnc/blob/63c08892710fac2493ee2cc5f016a44793d22297/.github/workflows/ci.yml#L29-44 ?

Please kindly help me out with a PR against my branch.

CI is clearly not the same as doing it locally:

$ git clone https://github.com/smoe/linuxcnc.git "linuxcnc git smoe"
$ cd "linuxcnc git smoe"
$ git checkout patch-17
$ cd src
$ ./autogen.sh
$ ./configure --enable-non-distributable
$ make
...
Compiling libnml/inifile/inifile.cc
c++: warning: git: linker input file unused because linking not done
c++: error: git: linker input file not found: No such file or directory
c++: warning: smoe/src/include: linker input file unused because linking not done
c++: error: smoe/src/include: linker input file not found: No such file or directory
make: *** [Makefile:287: objects/libnml/inifile/inifile.o] Error 1

Caused by an include to g++ (bold part):
c++ -c -I. -Ilibnml/linklist -Iemc -Ilibnml/cms -Ilibnml/rcs -Ilibnml/inifile -Ilibnml/os_intf -Ilibnml/nml -Ilibnml/buffer -Ilibnml/posemath -Irtapi -Ihal -Iemc -Iemc/nml_intf -Iemc/kinematics -Iemc/tp -Iemc/motion -Iemc/ini -Iemc -Iemc/rs274ngc -Iemc/sai -Iemc/pythonplugin -Iemc/tooldata -Iemc -I/home/me/lcnc/linuxcnc git smoe/src/include -I/usr/include/python3.12 -I/usr/include/tirpc -Os -fwrapv -g -Wall -D_FORTIFY_SOURCE=2 -DULAPI -Werror=overloaded-virtual -g -O2 -std=gnu++20 -fPIC \
-MP -MD -MF "objects/libnml/inifile/inifile.d" -MT "objects/libnml/inifile/inifile.o" \
libnml/inifile/inifile.cc -o objects/libnml/inifile/inifile.o

It fails on the (full) expansion of paths in the Makefile (maybe imported from Makefile.inc). This is probably not the only place where this expansion will be a problem. Many files and configurations need to be checked.

I finally tried this at home, via dpkg-buildpackage, and if failed immediately:

make[1]: Leaving directory '/home/moeller/GitHub/linux cnc'
   debian/rules override_dh_auto_build-arch
make[1]: Entering directory '/home/moeller/GitHub/linux cnc'
dh_auto_build -- build-software
date: invalid date '@'
date: invalid date '@'
Use of uninitialized value $abspath in -d at /usr/share/perl5/Debian/Debhelper/Buildsystem.pm line 140.
dh_auto_build: error: invalid or non-existing path to the source directory: /home/moeller/GitHub/linuxcnc/src
make[1]: *** [debian/rules:55: override_dh_auto_build-arch] Error 255
make[1]: Leaving directory '/home/moeller/GitHub/linux cnc'
make: *** [debian/rules:43: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
moeller@mariner1:/home/moeller/GitHub/linux cnc$

Yeah. I sent a bug report (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1110369) . And error is not in the line that is reported.