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| author | Simon McVittie <simon.mcvittie@collabora.co.uk> | 2011-01-10 16:42:57 +0000 |
|---|---|---|
| committer | Simon McVittie <simon.mcvittie@collabora.co.uk> | 2011-01-10 16:42:57 +0000 |
| commit | 3e1ed6823ff128c73656239dcf2fe0c4589e9f8a (patch) | |
| tree | c60a03c834771ab639a46de0444dcc480ee58ef1 /m4 | |
| parent | 0b3fd08ed314324ffa5328d0f4b7e68d54f56677 (diff) | |
Add TP_LINKER_FLAG, TP_ADD_LINKER_FLAG
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/tp-linker-flag.m4 | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/m4/tp-linker-flag.m4 b/m4/tp-linker-flag.m4 new file mode 100644 index 000000000..23eb41ad9 --- /dev/null +++ b/m4/tp-linker-flag.m4 @@ -0,0 +1,44 @@ +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 $1" + + AC_COMPILE_IFELSE(AC_LANG_PROGRAM([], []), [flag_ok=yes], [flag_ok=no]) + + LDFLAGS="$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"]) +]) |