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7fec638222
CMake parses some paths from the spec of the C compiler, assuming it
will be the linker, resulting in the link to end up with
`-L/usr/lib/gcc/x86_64-w64-mingw32/12-win32` on debian bookworm if both
-win32 and -posix variants are installed, and -win32 is the default
alternative.
This results in the wrong C++ library being linked, missing
std::threads::hardware_concurrency and other threading functions.
To fix this, use the -posix variant of gcc as well when available. This
fixes a regression compared to autotools, where this scenario worked.
Github-Pull: #31013
Rebased-From: ae56b3230b
25 lines
702 B
Makefile
25 lines
702 B
Makefile
ifneq ($(shell $(SHELL) $(.SHELLFLAGS) "command -v $(host)-gcc-posix"),)
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mingw32_CC := $(host)-gcc-posix
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endif
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ifneq ($(shell $(SHELL) $(.SHELLFLAGS) "command -v $(host)-g++-posix"),)
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mingw32_CXX := $(host)-g++-posix
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endif
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mingw32_CFLAGS=-pipe -std=$(C_STANDARD)
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mingw32_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
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ifneq ($(LTO),)
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mingw32_AR = $(host_toolchain)gcc-ar
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mingw32_NM = $(host_toolchain)gcc-nm
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mingw32_RANLIB = $(host_toolchain)gcc-ranlib
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endif
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mingw32_release_CFLAGS=-O2
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mingw32_release_CXXFLAGS=$(mingw32_release_CFLAGS)
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mingw32_debug_CFLAGS=-O1 -g
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mingw32_debug_CXXFLAGS=$(mingw32_debug_CFLAGS)
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mingw32_debug_CPPFLAGS=-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC
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mingw32_cmake_system=Windows
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