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| author | Bertrand SIMONNET <bsimonnet@chromium.org> | 2014-08-20 15:43:23 -0700 |
|---|---|---|
| committer | Simon McVittie <simon.mcvittie@collabora.co.uk> | 2015-02-20 20:49:45 +0000 |
| commit | 57696a2e8a5eb2df3177f5b52c512a14f3cab1f5 (patch) | |
| tree | 01646dc540fc6d36b4d5e00a1bce6d42564b3a30 /m4 | |
| parent | 7d214f4d5855c43a7aa0bec385d93e4a67a09f5f (diff) | |
| download | dbus-57696a2e8a5eb2df3177f5b52c512a14f3cab1f5.tar.gz | |
Link dbus-daemon and dbus-daemon-lauch-helper against libdbus
The shared can be used by dbus-daemon and dbus-daemon-launch-helper by exporting
the private symbols needed, reducing the size of dbus by about 500k.
The private symbols are exposed under the version
LIBDBUS_PRIVATE_@VERSION_NUMBER@.
[Altered by Simon McVittie and Ralf Habacker to clear up some
problematic linking.]
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=83115
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/ld-version-script.m4 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/m4/ld-version-script.m4 b/m4/ld-version-script.m4 new file mode 100644 index 00000000..228f52f5 --- /dev/null +++ b/m4/ld-version-script.m4 @@ -0,0 +1,43 @@ +# ld-version-script.m4 serial 1 +dnl Copyright (C) 2008, 2009 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Simon Josefsson + +# FIXME: The test below returns a false positive for mingw +# cross-compiles, 'local:' statements does not reduce number of +# exported symbols in a DLL. Use --disable-ld-version-script to work +# around the problem. + +# gl_LD_VERSION_SCRIPT +# -------------------- +# Check if LD supports linker scripts, and define automake conditional +# HAVE_LD_VERSION_SCRIPT if so. +AC_DEFUN([gl_LD_VERSION_SCRIPT], +[ + AC_ARG_ENABLE([ld-version-script], + AS_HELP_STRING([--enable-ld-version-script], + [enable linker version script (default is enabled when possible)]), + [have_ld_version_script=$enableval], []) + if test -z "$have_ld_version_script"; then + AC_MSG_CHECKING([if LD -Wl,--version-script works]) + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map" + cat > conftest.map <<EOF +VERS_1 { + global: sym; +}; + +VERS_2 { + global: sym; +} VERS_1; +EOF + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])], + [have_ld_version_script=yes], [have_ld_version_script=no]) + rm -f conftest.map + LDFLAGS="$save_LDFLAGS" + AC_MSG_RESULT($have_ld_version_script) + fi +]) |