transgui failed to build with lazarus 4.0 on Linux

[bassmadrigal]

The SlackBuilds.org package maintainer for lazarus notified me that transgui was failing to build when he was testing packages against their updated lazarus package (to 4.0) with the following error:

Error: (5000) Identifier not found "INVALID_HANDLE_VALUE"

Upon researching, I found that main.pas:1262 contained INVALID_HANDLE_VALUE, which seems to be undefined in Linux as it is win32 specific code. I am not sure why it worked fine with older versions of lazarus.

I eventually found I could work around this by switching that constant to something cross-platform. This changes this if h <> INVALID_HANDLE_VALUE then begin to this if h >= 0 then begin

I added this sed command to the SlackBuild so it can be automated by others building it:

sed -i 's|h <> INVALID_HANDLE_VALUE|h >= 0|' main.pas

I'd submit a PR, but this project seems (unfortunately) somewhat dead, so I added this as a reference for others to find if they come across a similar issue.

[k0ste]

I'd submit a PR, but this project seems (unfortunately) somewhat dead, so I added this as a reference for others to find if they come across a similar issue.

It's will be nice, if you do it at lighterowl/transgui

[lighterowl]

Done in lighterowl#144 , thanks.

[KarelWintersky]

same issue...