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| author | Austin Seipp <aseipp@pobox.com> | 2013-02-10 02:24:28 -0600 |
|---|---|---|
| committer | Austin Seipp <aseipp@pobox.com> | 2013-02-10 02:39:28 -0600 |
| commit | 61e8d5df26522b01922bc5358b9c233de0d1fc29 (patch) | |
| tree | 031f515a0e3bc2ba682598a699cf7f3a6e6ccb4b /aclocal.m4 | |
| parent | ae06df63bef37c688b135ae9df3dcc1998375042 (diff) | |
| download | haskell-61e8d5df26522b01922bc5358b9c233de0d1fc29.tar.gz | |
Better detection of clang in ./configure. Issue #7678.
Signed-off-by: Austin Seipp <aseipp@pobox.com>
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index 837eea05a2..32af656b5b 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1136,19 +1136,30 @@ AC_SUBST(GccLT34) AC_SUBST(GccLT46) ])# FP_GCC_VERSION -dnl Check to see if the C compiler uses an LLVM back end +dnl Check to see if the C compiler is clang or llvm-gcc dnl AC_DEFUN([FP_CC_LLVM_BACKEND], [AC_REQUIRE([AC_PROG_CC]) -AC_MSG_CHECKING([whether C compiler has an LLVM back end]) +AC_MSG_CHECKING([whether C compiler is clang]) $CC -x c /dev/null -dM -E > conftest.txt 2>&1 -if grep "__llvm__" conftest.txt >/dev/null 2>&1; then +if grep "__clang__" conftest.txt >/dev/null 2>&1; then + AC_SUBST([CC_CLANG_BACKEND], [1]) AC_SUBST([CC_LLVM_BACKEND], [1]) AC_MSG_RESULT([yes]) else - AC_SUBST([CC_LLVM_BACKEND], [0]) AC_MSG_RESULT([no]) + AC_MSG_CHECKING([whether C compiler has an LLVM back end]) + if grep "__llvm__" conftest.txt >/dev/null 2>&1; then + AC_SUBST([CC_CLANG_BACKEND], [0]) + AC_SUBST([CC_LLVM_BACKEND], [1]) + AC_MSG_RESULT([yes]) + else + AC_SUBST([CC_CLANG_BACKEND], [0]) + AC_SUBST([CC_LLVM_BACKEND], [0]) + AC_MSG_RESULT([no]) + fi fi + rm -f conftest.txt ]) |