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CMake/Windows: Add a workaround for windres from GNU binutils.

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This is combined from the following commits in the master branch:
443dfebced
6b117d3b1f
5e34774c31

Thanks to Iouri Kharon for the bug report, the original patch,
and testing.
This commit is contained in:
Lasse Collin 2023-01-10 08:50:26 +02:00
parent 35167d71f8
commit f2192d13b5
1 changed files with 31 additions and 1 deletions
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32
CMakeLists.txt
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@ -72,10 +72,40 @@ project(xz VERSION "${XZ_VERSION}" LANGUAGES C)
# On Apple OSes, don't build executables as bundles:
set(CMAKE_MACOSX_BUNDLE OFF)
# windres from GNU binutils can be tricky with command line arguments
# that contain spaces or other funny characters. Unfortunately we need
# a space in PACKAGE_NAME. Using \x20 to encode the US-ASCII space seems
# to work in both cmd.exe and /bin/sh.
#
# However, even \x20 isn't enough in all situations, resulting in
# "syntax error" from windres. Using --use-temp-file prevents windres
# from using popen() and this seems to fix the problem.
#
# llvm-windres claims to be compatible with GNU windres but with that
# the \x20 results in "XZx20Utils" in the compiled binary. (At the
# same time it works correctly with clang (the C compiler).) The option
# --use-temp-file makes no difference.
#
# CMake 3.25 doesn't have CMAKE_RC_COMPILER_ID so we rely on
# CMAKE_C_COMPILER_ID. If Clang is used together with GNU windres
# then it will fail, but this way the risk of a bad string in
# the binary should be fairly low.
if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "GNU")
# Use workarounds with GNU windres. The \x20 in PACKAGE_NAME works
# with gcc too so we don't need to worry how to pass different flags
# to windres and gcc.
string(APPEND CMAKE_RC_FLAGS " --use-temp-file")
set(PACKAGE_NAME "XZ\\x20Utils")
else()
# Elsewhere a space is safe. This also keeps things compatible with
# EBCDIC in case CMake-based build is ever done on such a system.
set(PACKAGE_NAME "XZ Utils")
endif()
# Definitions common to all targets:
add_compile_definitions(
# Package info:
PACKAGE_NAME="XZ Utils"
PACKAGE_NAME="${PACKAGE_NAME}"
PACKAGE_BUGREPORT="xz@tukaani.org"
PACKAGE_URL="https://tukaani.org/xz/"