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| author | Ben Gamari <ben@well-typed.com> | 2022-05-19 16:38:25 -0400 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-07-16 23:50:36 -0400 |
| commit | 5781a36022bd1f1e7344d3f6530c163dd2587e78 (patch) | |
| tree | 0e461260b6cb5d74a34fa49acad3b489adaecf08 /m4 | |
| parent | 2cd75550cad93b84a4ef831c5dc8f40071c3a903 (diff) | |
| download | haskell-5781a36022bd1f1e7344d3f6530c163dd2587e78.tar.gz | |
Statically-link against libc++ on Windows
Unfortunately on Windows we have no RPATH-like facility, making dynamic
linking extremely fragile. Since we cannot assume that the user will
add their GHC installation to `$PATH` (and therefore their DLL
search path) we cannot assume that the loader will be able to locate our
`libc++.dll`. To avoid this, we instead statically link against `libc++.a` on
Windows.
Fixes #21435.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/fp_setup_windows_toolchain.m4 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/m4/fp_setup_windows_toolchain.m4 b/m4/fp_setup_windows_toolchain.m4 index 15b85b2bb2..e1a2244c37 100644 --- a/m4/fp_setup_windows_toolchain.m4 +++ b/m4/fp_setup_windows_toolchain.m4 @@ -78,6 +78,7 @@ AC_DEFUN([FP_SETUP_WINDOWS_TOOLCHAIN],[ # for the runtime, libc++ and libc++abi for the C++ standard library # implementation, and libunwind for C++ unwinding. mingwbin="$hardtop/inplace/mingw/bin/" + mingwlib="$hardtop/inplace/mingw/lib/" CC="${mingwbin}clang.exe" CXX="${mingwbin}clang++.exe" @@ -94,6 +95,12 @@ AC_DEFUN([FP_SETUP_WINDOWS_TOOLCHAIN],[ CONF_GCC_LINKER_OPTS_STAGE1="-fuse-ld=lld $cflags" CONF_GCC_LINKER_OPTS_STAGE2="-fuse-ld=lld $cflags" + # N.BOn Windows we can't easily dynamically-link against libc++ since there is + # no RPATH support, meaning that the loader will have no way of finding our + # libc++.dll + CXX_STD_LIB_LIBS=":libc++.a :libc++abi.a" + CXX_STD_LIB_LIB_DIRS="\$topdir" + LD="${mingwbin}ld.lld.exe" NM="${mingwbin}llvm-nm.exe" AR="${mingwbin}llvm-ar.exe" |