Accepting request 1135257 from devel:libraries:c_c++

OBS-URL: https://build.opensuse.org/request/show/1135257
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/spdlog?expand=0&rev=31

spdlog.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Dec 14 09:47:07 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
+
+- Add some symbol versions to ease rebuilds and transition on
+  user systems when fmt changes [boo#1217820]
+
 -------------------------------------------------------------------
 Thu Nov 16 13:08:02 UTC 2023 - Jiri Srain <jsrain@suse.com>
 

spdlog.spec

@@ -77,6 +77,12 @@ sed -i -e "s,\r,," README.md LICENSE
 %build
 export CXX=g++
 test -x "$(type -p g++-8)" && export CXX=g++-8
+
+# spdlog embodies fmt ABI; add some symvers so both ld.so and rpm notice the change.
+v=$(rpm -q --qf="%%{VERSION}" --whatprovides "pkgconfig(fmt)" | sed -e 's/\..*//')
+echo "FMT_$v { global: _ZN6spdlog*N3fmt${#v}v${v}; };" >spdlog.sym
+v="$PWD/spdlog.sym"
+
 %cmake -G Ninja \
     -DSPDLOG_BUILD_TESTS=ON \
     -DSPDLOG_BUILD_BENCH=OFF \
@@ -84,6 +90,7 @@ test -x "$(type -p g++-8)" && export CXX=g++-8
     -DCMAKE_BUILD_TYPE=Release \
     -DSPDLOG_BUILD_EXAMPLES=OFF \
     -DSPDLOG_BUILD_SHARED=ON \
+    -DCMAKE_SHARED_LINKER_FLAGS="%{?build_ldflags} -Wl,--as-needed -Wl,-z,now  -Wl,--version-script=$v" \
 ..
 %ninja_build