Build fails with --as-needed linker flag

[krissn@…]

When building 0.14.1 on Gentoo with LDFLAGS="-Wl,--as-needed" the compilation fails reporting a problem linking the libsvnqt.so library:

Linking CXX shared library ../../lib/libsvnqt.so
[ 44%] Building CXX object src/ksvnwidgets/CMakeFiles/ksvnwidgets.dir/authdlg.o
[ 44%] Building CXX object src/settings/CMakeFiles/settingsdlgs.dir/diffmergesettings.o
CMakeFiles/svnqt.dir/datetime.o: In function `svn::DateTime::SetRFC822Date(char const*)':
datetime.cpp:(.text+0x208): undefined reference to `apr_date_parse_rfc'
collect2: ld returned 1 exit status
make[2]: *** [lib/libsvnqt.so.4.0.0] BÅ‚Ä…d 1
make[1]: *** [src/svnqt/CMakeFiles/svnqt.dir/all] BÅ‚Ä…d 2
make[1]: *** Oczekiwanie na niezakończone zadania....

The problem appears when apr and apr-utils are linked with --as-needed. The linking command line first includes those libraries with their full LDFLAGS, but due to --as-needed behavior the linker discards them, causing the libraries not to be included in the list of finally required libraries.

The issue is tracked as bug #187318 on Gentoo Bugzilla (http://bugs.gentoo.org/show_bug.cgi?id=187318)

The attached patch fixes the build in my case.

[krissn@…]

Proposed patch fixing the build

[alwin]

Tnx!

[orion@…]

This is the patch I use in Fedora to build with the -Wl,--as-needed flag.

[orion]

Current 1.2.0 as needed patch

[orion]

Appears to be fixed in 1.2.2