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Diffstat (limited to 'common/m4/as-compiler-flag.m4')
| -rw-r--r-- | common/m4/as-compiler-flag.m4 | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/common/m4/as-compiler-flag.m4 b/common/m4/as-compiler-flag.m4 new file mode 100644 index 0000000..882a4c7 --- /dev/null +++ b/common/m4/as-compiler-flag.m4 @@ -0,0 +1,64 @@ +dnl as-compiler-flag.m4 0.1.0 + +dnl autostars m4 macro for detection of compiler flags + +dnl David Schleef <ds@schleef.org> +dnl Tim-Philipp Müller <tim centricular net> + +dnl AS_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED]) +dnl Tries to compile with the given CFLAGS. +dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags, +dnl and ACTION-IF-NOT-ACCEPTED otherwise. + +AC_DEFUN([AS_COMPILER_FLAG], +[ + AC_MSG_CHECKING([to see if compiler understands $1]) + + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $1" + + AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no]) + CFLAGS="$save_CFLAGS" + + if test "X$flag_ok" = Xyes ; then + $2 + true + else + $3 + true + fi + AC_MSG_RESULT([$flag_ok]) +]) + +dnl AS_CXX_COMPILER_FLAG(CPPFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED]) +dnl Tries to compile with the given CPPFLAGS. +dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags, +dnl and ACTION-IF-NOT-ACCEPTED otherwise. + +AC_DEFUN([AS_CXX_COMPILER_FLAG], +[ + AC_REQUIRE([AC_PROG_CXX]) + + AC_MSG_CHECKING([to see if c++ compiler understands $1]) + + save_CPPFLAGS="$CPPFLAGS" + CPPFLAGS="$CPPFLAGS $1" + + AC_LANG_PUSH(C++) + + AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no]) + CPPFLAGS="$save_CPPFLAGS" + + if test "X$flag_ok" = Xyes ; then + $2 + true + else + $3 + true + fi + + AC_LANG_POP(C++) + + AC_MSG_RESULT([$flag_ok]) +]) + |