diff options
Diffstat (limited to 'm4/clang.m4')
| -rw-r--r-- | m4/clang.m4 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/m4/clang.m4 b/m4/clang.m4 new file mode 100644 index 00000000..11911ce2 --- /dev/null +++ b/m4/clang.m4 @@ -0,0 +1,19 @@ +# _AC_LANG_COMPILER_CLANG +# --------------------- +# Check whether the compiler for the current language is clang. +# Adapted from standard autoconf function: _AC_LANG_COMPILER_GNU +# +# Note: clang also identifies itself as a GNU compiler (gcc 4.2.1) +# for compatibility reasons, so that cannot be used to determine +m4_define([_AC_LANG_COMPILER_CLANG], +[AC_CACHE_CHECK([whether we are using the clang _AC_LANG compiler], + [ac_cv_[]_AC_LANG_ABBREV[]_compiler_clang], +[_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#ifndef __clang__ + choke me +#endif +]])], + [ac_compiler_clang=yes], + [ac_compiler_clang=no]) +ac_cv_[]_AC_LANG_ABBREV[]_compiler_clang=$ac_compiler_clang +])])# _AC_LANG_COMPILER_CLANG + |