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| author | Akira TAGOH <akira@tagoh.org> | 2013-12-02 18:43:10 +0900 |
|---|---|---|
| committer | Akira TAGOH <akira@tagoh.org> | 2013-12-02 18:43:10 +0900 |
| commit | 51521153490ab0b01959c10c57e476de3ad27acb (patch) | |
| tree | aaf5b704abceda0a2e4a56ce0c4eea98c4ead8b5 /m4 | |
| parent | 59fd9960bbb58fd6257adb13ec0f918882149332 (diff) | |
Simplify to validate the availability of posix_fadvise
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/ac_check_symbol.m4 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/m4/ac_check_symbol.m4 b/m4/ac_check_symbol.m4 new file mode 100644 index 00000000..41c15286 --- /dev/null +++ b/m4/ac_check_symbol.m4 @@ -0,0 +1,48 @@ +dnl @synopsis AC_CHECK_SYMBOL(SYMBOL, HEADER... [,ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]]) +dnl +dnl a wrapper around AC_EGREP_HEADER the shellvar $ac_found will hold +dnl the HEADER-name that had been containing the symbol. This value is +dnl shown to the user. +dnl +dnl @category C +dnl @author Guido U. Draheim <guidod@gmx.de> +dnl @version 2006-10-13 +dnl @license GPLWithACException + +AC_DEFUN([AC_CHECK_SYMBOL], +[AC_MSG_CHECKING([for $1 in $2]) +AC_CACHE_VAL(ac_cv_func_$1, +[AC_REQUIRE_CPP()dnl +changequote(, )dnl +symbol="[^a-zA-Z_0-9]$1[^a-zA-Z_0-9]" +changequote([, ])dnl +ac_found=no +for ac_header in $2 ; do + ac_safe=`echo "$ac_header" | sed 'y%./+-%__p_%' ` + if test $ac_found != "yes" ; then + if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then + AC_EGREP_HEADER( $symbol, $ac_header, [ac_found="$ac_header"] ) + fi + fi +done +if test "$ac_found" != "no" ; then + AC_MSG_RESULT($ac_found) + ifelse([$3], , :, [$3]) +else + AC_MSG_RESULT(no) + ifelse([$4], , , [$4 +])dnl +fi +])]) + +dnl AC_CHECK_SYMBOLS( symbol..., header... [, action-if-found [, action-if-not-found]]) +AC_DEFUN([AC_CHECK_SYMBOLS], +[for ac_func in $1 +do +P4_CHECK_SYMBOL($ac_func, $2, +[changequote(, )dnl + ac_tr_func=HAVE_`echo $ac_func | sed -e 'y:abcdefghijklmnopqrstuvwxyz:ABCDEFGHIJKLMNOPQRSTUVWXYZ:' -e 's:[[^A-Z0-9]]:_:'` +changequote([, ])dnl + AC_DEFINE_UNQUOTED($ac_tr_func) $2], $3)dnl +done +]) |