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| author | Ben Gamari <ben@smart-cactus.org> | 2022-08-07 19:28:20 -0400 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-08-09 13:46:48 -0400 |
| commit | 5d66a0ce39f47b7b9f6c732a18ac6e102a21ee6b (patch) | |
| tree | 60416314b5ed1e39e8b838b748b218d36057fcf1 /m4 | |
| parent | 66d2e927842653fbc1cf2e6f997f443c78c2203b (diff) | |
| download | haskell-5d66a0ce39f47b7b9f6c732a18ac6e102a21ee6b.tar.gz | |
system-cxx-std-lib: Add support for FreeBSD libcxxrt
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/fp_find_cxx_std_lib.m4 | 75 |
1 files changed, 55 insertions, 20 deletions
diff --git a/m4/fp_find_cxx_std_lib.m4 b/m4/fp_find_cxx_std_lib.m4 index 68ac0e617d..24f78d0a6f 100644 --- a/m4/fp_find_cxx_std_lib.m4 +++ b/m4/fp_find_cxx_std_lib.m4 @@ -18,10 +18,44 @@ unknown #endif EOF AC_MSG_CHECKING([C++ standard library flavour]) - if "$CXX" -E actest.cpp -o actest.out; then - if grep "libc++" actest.out >/dev/null; then - CXX_STD_LIB_LIBS="c++ c++abi" - p="`"$CXX" --print-file-name libc++.so`" + if ! "$CXX" -E actest.cpp -o actest.out; then + rm -f actest.cpp actest.out + AC_MSG_ERROR([Failed to compile test program]) + fi + + dnl Identify standard library type + if grep "libc++" actest.out >/dev/null; then + CXX_STD_LIB_FLAVOUR="c++" + AC_MSG_RESULT([libc++]) + elif grep "libstdc++" actest.out >/dev/null; then + CXX_STD_LIB_FLAVOUR="stdc++" + AC_MSG_RESULT([libstdc++]) + else + rm -f actest.cpp actest.out + AC_MSG_ERROR([Unknown C++ standard library implementation.]) + fi + rm -f actest.cpp actest.out + + dnl ----------------------------------------- + dnl Figure out how to link... + dnl ----------------------------------------- + cat >actest.cpp <<-EOF +#include <iostream> +int main(int argc, char** argv) { + std::cout << "hello world\n"; + return 0; +} +EOF + if ! "$CXX" -c actest.cpp; then + AC_MSG_ERROR([Failed to compile test object]) + fi + + try_libs() { + dnl Try to link a plain object with CC manually + AC_MSG_CHECKING([for linkage against '${3}']) + if "$CC" -o actest actest.o ${1} 2>/dev/null; then + CXX_STD_LIB_LIBS="${3}" + p="`"$CXX" --print-file-name ${2}`" d="`dirname "$p"`" dnl On some platforms (e.g. Windows) the C++ standard library dnl can be found in the system search path. In this case $CXX @@ -31,24 +65,25 @@ EOF if test "$d" = "."; then d=""; fi CXX_STD_LIB_LIB_DIRS="$d" CXX_STD_LIB_DYN_LIB_DIRS="$d" - AC_MSG_RESULT([libc++]) - elif grep "libstdc++" actest.out >/dev/null; then - CXX_STD_LIB_LIBS="stdc++" - p="`"$CXX" --print-file-name libstdc++.so`" - d="`dirname "$p"`" - if test "$d" = "."; then d=""; fi - CXX_STD_LIB_LIB_DIRS="$d" - CXX_STD_LIB_DYN_LIB_DIRS="$d" - AC_MSG_RESULT([libstdc++]) + AC_MSG_RESULT([success]) + true else - rm -f actest.cpp actest.out - AC_MSG_ERROR([Unknown C++ standard library implementation.]) + AC_MSG_RESULT([failed]) + false fi - rm -f actest.cpp actest.out - else - rm -f actest.cpp actest.out - AC_MSG_ERROR([Failed to compile test program]) - fi + } + case $CXX_STD_LIB_FLAVOUR in + c++) + try_libs "-lc++ -lc++abi" "libc++.so" "c++ c++abi" || \ + try_libs "-lc++ -lcxxrt" "libc++.so" "c++ cxxrt" || + AC_MSG_ERROR([Failed to find C++ standard library]) ;; + stdc++) + try_libs "-lstdc++" "libstdc++.so" "stdc++" || \ + try_libs "-lstdc++ -lsupc++" "libstdc++.so" "stdc++ supc++" || \ + AC_MSG_ERROR([Failed to find C++ standard library]) ;; + esac + + rm -f actest.cpp actest.o actest fi AC_SUBST([CXX_STD_LIB_LIBS]) |