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by brian
clean slate |
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# option, cache_name, variable, |
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# code to execute if yes, code to exectute if fail |
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AC_DEFUN([AC_SYS_COMPILER_FLAG], |
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[
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AC_MSG_CHECKING($1)
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OLD_CFLAGS="[$]CFLAGS" |
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AC_CACHE_VAL(mysql_cv_option_$2,
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[
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CFLAGS="[$]OLD_CFLAGS $1" |
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AC_TRY_LINK([int main(){exit(0);}],mysql_cv_option_$2=yes,mysql_cv_option_$2=no,mysql_cv_option_$2=no)
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])
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CFLAGS="[$]OLD_CFLAGS" |
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if test x"[$]mysql_cv_option_$2" = "xyes" ; then |
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$3="[$]$3 $1" |
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AC_MSG_RESULT(yes)
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$5
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else
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AC_MSG_RESULT(no)
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$4
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fi
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])
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# arch, option, cache_name, variable
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AC_DEFUN([AC_SYS_CPU_COMPILER_FLAG],
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[
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if test "`uname -m 2>/dev/null`" = "$1" ; then |
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AC_SYS_COMPILER_FLAG($2,$3,$4)
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fi
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])
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# os, option, cache_name, variable
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AC_DEFUN([AC_SYS_OS_COMPILER_FLAG],
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[
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if test "x$mysql_cv_sys_os" = "x$1" ; then |
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AC_SYS_COMPILER_FLAG($2,$3,$4)
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fi
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])
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AC_DEFUN([AC_CHECK_NOEXECSTACK],
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[
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AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
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mysql_cv_as_noexecstack, [dnl
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cat > conftest.c <<EOF
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void foo (void) { }
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EOF
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
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-S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
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&& grep .note.GNU-stack conftest.s >/dev/null \
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&& AC_TRY_COMMAND([${CC-cc} $CCASFLAGS $CPPFLAGS -Wa,--noexecstack
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-c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
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then
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mysql_cv_as_noexecstack=yes
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else
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mysql_cv_as_noexecstack=no
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fi
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rm -f conftest*])
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if test $mysql_cv_as_noexecstack = yes; then
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CCASFLAGS="$CCASFLAGS -Wa,--noexecstack" |
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fi |
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]) |