45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
dnl A version of AS_COMPILER_FLAG that supports linker flags
|
|
dnl Based on:
|
|
|
|
dnl as-compiler-flag.m4 0.1.0
|
|
dnl autostars m4 macro for detection of compiler flags
|
|
dnl David Schleef <ds@schleef.org>
|
|
dnl $Id: as-compiler-flag.m4,v 1.1 2005/06/18 18:02:46 burgerman Exp $
|
|
|
|
dnl TP_LINKER_FLAG(LDFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
|
|
dnl Tries to compile with the given LDFLAGS.
|
|
dnl
|
|
dnl Runs ACTION-IF-ACCEPTED if the compiler/linker for the currently selected
|
|
dnl AC_LANG can compile with the flags, and ACTION-IF-NOT-ACCEPTED otherwise.
|
|
dnl
|
|
dnl Note that LDFLAGS are passed to the linker via the compiler, so you
|
|
dnl should check for -Wl,--no-add-needed rather than --no-add-needed.
|
|
|
|
AC_DEFUN([TP_LINKER_FLAG],
|
|
[
|
|
AC_MSG_CHECKING([to see if compiler/linker understand $1])
|
|
|
|
save_LDFLAGS="$LDFLAGS"
|
|
LDFLAGS="$LDFLAGS $1"
|
|
|
|
AC_COMPILE_IFELSE(AC_LANG_SOURCE([]), [flag_ok=yes], [flag_ok=no])
|
|
|
|
LDFLAGS="$save_LDFLAGS"
|
|
|
|
if test "X$flag_ok" = Xyes ; then
|
|
$2
|
|
true
|
|
else
|
|
$3
|
|
true
|
|
fi
|
|
AC_MSG_RESULT([$flag_ok])
|
|
])
|
|
|
|
dnl TP_ADD_LINKER_FLAG(VARIABLE, LDFLAGS)
|
|
dnl Append LDFLAGS to VARIABLE if the linker supports them.
|
|
AC_DEFUN([TP_ADD_LINKER_FLAG],
|
|
[
|
|
TP_LINKER_FLAG([$2], [$1="[$]$1 $2"])
|
|
])
|