| dnl AC_GCC_VERSION |
| dnl check for compiler version |
| dnl sets COMPILER_VERSION and GCC_VERSION |
| |
| AC_DEFUN([AC_CC_VERSION], |
| [ |
| AC_MSG_CHECKING([C compiler version]) |
| COMPILER_VERSION=`$CC -v 2>&1 | grep version` |
| case "$COMPILER_VERSION" in |
| *gcc*) |
| dnl Ok, how to turn $3 into the real $3 |
| GCC_VERSION=`echo $COMPILER_VERSION | \ |
| sed -e 's/[[^ ]]*\ [[^ ]]*\ \([[^ ]]*\)\ .*/\1/'` ;; |
| *) GCC_VERSION=unknown ;; |
| esac |
| AC_MSG_RESULT($GCC_VERSION) |
| ]) |
| |
| dnl AC_TRY_CCFLAG([CCFLAG], [VAR], [ACTION-IF-WORKS], [ACTION-IF-FAILS]) |
| dnl check if $CC supports a given flag |
| |
| AC_DEFUN([AC_TRY_CCFLAG], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| ac_save_CFLAGS=$CFLAGS |
| CFLAGS=$1 |
| AC_CACHE_CHECK([whether $CC accepts $1 flag], [ac_cv_flag_$2], |
| [AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], |
| [AS_VAR_SET([ac_cv_flag_$2], [yes])], |
| [AS_VAR_SET([ac_cv_flag_$2], [no])])]) |
| CFLAGS=$ac_save_CFLAGS |
| $2=AS_VAR_GET([ac_cv_flag_$2]) |
| if test "$2" = yes; then |
| ifelse([$3], [], [:], [$3]) |
| else |
| ifelse([$4], [], [:], [$4]) |
| fi |
| ]) |
| |
| dnl AC_IF_YES([TEST-FOR-YES], [ACTION-IF-TRUE], [ACTION-IF-FALSE]) |
| dnl AS_IF() abstraction, checks shell variable for 'yes' |
| AC_DEFUN([AC_IF_YES], [AS_IF([test $$1 = yes], [$2], [$3])]) |
| |
| dnl AC_TRY_LDFLAGS([LDFLAGS], [VAR], [ACTION-IF-WORKS], [ACTION-IF-FAILS]) |
| dnl check if $CC supports given ld flags |
| |
| AC_DEFUN([AC_TRY_LDFLAGS], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| ac_save_LDFLAGS=$LDFLAGS |
| LDFLAGS=$1 |
| AC_CACHE_CHECK([whether $CC accepts $1 ld flags], [ac_cv_flag_$2], |
| [AC_LINK_IFELSE([AC_LANG_PROGRAM()], |
| [AS_VAR_SET([ac_cv_flag_$2], [yes])], |
| [AS_VAR_SET([ac_cv_flag_$2], [no])])]) |
| LDFLAGS=$ac_save_LDFLAGS |
| $2=AS_VAR_GET([ac_cv_flag_$2]) |
| if test "$2" = yes; then |
| ifelse([$3], [], [:], [$3]) |
| else |
| ifelse([$4], [], [:], [$4]) |
| fi |
| ]) |