Bug 36508 – Solaris: linker flag "--gc-sections" not supported

• Component: WebCore Misc.
• Status: UNCONFIRMED

[[e-mail]]

When WebKit is being compiled in KDE's kde-qt (qt.gitorious.org/qt/kde-qt), there's a long, long command at the end that calls the linker. The command starts like this:

g++ -Wl,--gc-sections -Wl,-R,/export/home/torti/qt/lib -Wl,-R,/export/home/torti/qt/lib -shared -h libQtWebKit.so.4 -o libQtWebKit.so.4.6.0 obj/release/pcre_compile.o obj/release/pcre_exec.o obj/release/pcre_tables.o [...]

And linking fails. After removing "--gc-sections" out of the parameter list, the command succeeds. So I guess it's not supported. This issue might be specific to openSolaris/x86 (32bit) with gcc 3.4.3.

$ ld --version
GNU ld (GNU Binutils) 2.19
Copyright 2007 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or (at your option) a later version. This program has absolutely no warranty.

$ g++ --version
g++ (GCC) 3.4.3 (csl-sol210-3_4-20050802)
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[[e-mail]]

Created attachment 63817 [details]
removes gc-sections flag for solaris/gcc compatibility

[[e-mail]]

The bug is still present. It's caused by the following line...

unix:!mac:*-g++*:QMAKE_LFLAGS += -Wl,--gc-sections

...in the file WebCore/WebCore.pro. Please fix or remove it like in the attached patch file.

[Xavier Roche]

As suggested by Konstantin Tokarev on the qt-interest list, -ffunction-sections and -fdata-sections are not relevant anymore without --gc-sections

Hence, the following patch might be better


--- src/3rdparty/webkit/WebCore/WebCore.pro.orig        Thu Sep 15 16:24:13 2011
+++ src/3rdparty/webkit/WebCore/WebCore.pro     Thu Sep 15 16:24:44 2011
@@ -88,8 +88,8 @@
     QMAKE_PKGCONFIG_REQUIRES = QtCore QtGui QtNetwork
 }

-unix:!mac:*-g++*:QMAKE_CXXFLAGS += -ffunction-sections -fdata-sections
-unix:!mac:*-g++*:QMAKE_LFLAGS += -Wl,--gc-sections
+unix:!mac:*-g++*:!solaris*:QMAKE_CXXFLAGS += -ffunction-sections -fdata-sections
+unix:!mac:*-g++*:!solaris*:QMAKE_LFLAGS += -Wl,--gc-sections
 linux*-g++*:QMAKE_LFLAGS += $$QMAKE_LFLAGS_NOUNDEF

 CONFIG(release):!CONFIG(standalone_package) {