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Viewing changes to config/ac-macros/compiler_flag.m4

  • Committer: brian
  • Date: 2008-06-25 05:29:13 UTC
  • Revision ID: brian@localhost.localdomain-20080625052913-6upwo0jsrl4lnapl
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config/ac-macros/compiler_flag.m4
 
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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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])