1 files changed, 90 insertions, 0 deletions
diff --git a/m4/efl_compiler.m4 b/m4/efl_compiler.m4
new file mode 100644
index 0000000..32819f2
--- /dev/null
+++ b/m4/efl_compiler.m4
@@ -0,0 +1,90 @@
+dnl Copyright (C) 2012 Vincent Torri <vincent dot torri at gmail dot com>
+dnl This code is public domain and can be freely used or copied.
+
+dnl Macro that check if compiler of linker flags are available
+
+
+dnl Macro that checks for a compiler flag availability
+dnl
+dnl _EFL_CHECK_COMPILER_FLAGS(EFL, FLAGS)
+dnl AC_SUBST : EFL_CFLAGS (EFL being replaced by its value)
+dnl have_flag: yes or no.
+AC_DEFUN([_EFL_CHECK_COMPILER_FLAGS],
+[dnl
+m4_pushdef([UPEFL], m4_translit([[$1]], [-a-z], [_A-Z]))dnl
+
+dnl store in options -Wfoo if -Wno-foo is passed
+option="m4_bpatsubst([[$2]], [-Wno-], [-W])"
+CFLAGS_save="${CFLAGS}"
+CFLAGS="${CFLAGS} ${option}"
+AC_LANG_PUSH([C])
+
+AC_MSG_CHECKING([whether the compiler supports $2])
+AC_COMPILE_IFELSE(
+   [AC_LANG_PROGRAM([[]])],
+   [have_flag="yes"],
+   [have_flag="no"])
+AC_MSG_RESULT([${have_flag}])
+
+AC_LANG_POP([C])
+CFLAGS="${CFLAGS_save}"
+if test "x${have_flag}" = "xyes" ; then
+   UPEFL[_CFLAGS]="${UPEFL[_CFLAGS]} [$2]"
+fi
+AC_SUBST(UPEFL[_CFLAGS])dnl
+m4_popdef([UPEFL])dnl
+])
+
+dnl EFL_CHECK_COMPILER_FLAGS(EFL, FLAGS)
+dnl Checks if FLAGS are supported and add to EFL_CLFAGS.
+dnl
+dnl It will first try every flag at once, if one fails will try them one by one.
+AC_DEFUN([EFL_CHECK_COMPILER_FLAGS],
+[dnl
+_EFL_CHECK_COMPILER_FLAGS([$1], [$2])
+if test "${have_flag}" != "yes"; then
+m4_foreach_w([flag], [$2], [_EFL_CHECK_COMPILER_FLAGS([$1], m4_defn([flag]))])
+fi
+])
+
+
+dnl Macro that checks for a linker flag availability
+dnl
+dnl _EFL_CHECK_LINKER_FLAGS(EFL, FLAGS)
+dnl AC_SUBST : EFL_LDFLAGS (EFL being replaced by its value)
+dnl have_flag: yes or no
+AC_DEFUN([_EFL_CHECK_LINKER_FLAGS],
+[dnl
+m4_pushdef([UPEFL], m4_translit([[$1]], [-a-z], [_A-Z]))dnl
+
+LDFLAGS_save="${LDFLAGS}"
+LDFLAGS="${LDFLAGS} $2"
+AC_LANG_PUSH([C])
+
+AC_MSG_CHECKING([whether the linker supports $2])
+AC_LINK_IFELSE(
+   [AC_LANG_PROGRAM([[]])],
+   [have_flag="yes"],
+   [have_flag="no"])
+AC_MSG_RESULT([${have_flag}])
+
+AC_LANG_POP([C])
+LDFLAGS="${LDFLAGS_save}"
+if test "x${have_flag}" = "xyes" ; then
+   UPEFL[_LDFLAGS]="${UPEFL[_LDFLAGS]} [$2]"
+fi
+AC_SUBST(UPEFL[_LDFLAGS])dnl
+m4_popdef([UPEFL])dnl
+])
+
+dnl EFL_CHECK_LINKER_FLAGS(EFL, FLAGS)
+dnl Checks if FLAGS are supported and add to EFL_CLFAGS.
+dnl
+dnl It will first try every flag at once, if one fails will try them one by one.
+AC_DEFUN([EFL_CHECK_LINKER_FLAGS],
+[dnl
+_EFL_CHECK_LINKER_FLAGS([$1], [$2])
+if test "${have_flag}" != "yes"; then
+m4_foreach_w([flag], [$2], [_EFL_CHECK_LINKER_FLAGS([$1], m4_defn([flag]))])
+fi
+])dnl