How to build as static library on Linux?

[uilianries]

Greetings!

I'm trying to build version 3.8 from scratch, but as a static library. Unfortunately, it fails with the following error:

[123/470] /usr/bin/c++ -DARROW_STATIC -DBOOST_STACKTRACE_ADDR2LINE_LOCATION=\"/usr/bin/addr2line\" -DBOOST_STACKTRACE_USE_ADDR2LINE -DBOOST_STACKTRACE_USE_BACKTRACE -DBOOST_STACKTRACE_USE_NOOP -DCURL_STATICLIB=1 -DLERC_STATIC -DLIBJPEG_STATIC -DLZMA_API_STATIC -DOSGEARTH_LIBRARY_STATIC -DOSG_LIBRARY_STATIC -DPARQUET_STATIC -DPROJ_DLL="" -DSPDLOG_COMPILED_LIB -DSPDLOG_FMT_EXTERNAL -DUSE_UNSTABLE_GEOS_CPP_API -DXML_STATIC -I/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/build/Release/build_include -I/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/src/src -I/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/build/Release/src/osgEarth -isystem /home/conan/.conan2/p/opens08f6044344f0b/p/include -isystem /home/conan/.conan2/p/sqlit6ae3bc616ab9d/p/include -isystem /home/conan/.conan2/p/zlib76e00a316e585/p/include -isystem /home/conan/.conan2/p/proto460e1423ae0e2/p/include -isystem /home/conan/.conan2/p/absei5941141b8927a/p/include -isystem /home/conan/.conan2/p/spdlo2faee3ddaa48f/p/include -isystem /home/conan/.conan2/p/fmt091cbdaf9fb57/p/include -isystem /home/conan/.conan2/p/geos4add82c1a73b6/p/include -isystem /home/conan/.conan2/p/libcu3a669845096ef/p/include -isystem /home/conan/.conan2/p/b/gdal083f507d8ea2d/p/include -isystem /home/conan/.conan2/p/lerc99e4cfa87fe41/p/include -m64 -O3 -DNDEBUG -std=c++17 -fPIC -MD -MT src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o -MF src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o.d -o src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o -c /home/conan/.conan2/p/b/osgeabf18fc06a2225/b/src/src/osgEarth/GeometryUtils.cpp
FAILED: [code=1] src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o 
/usr/bin/c++ -DARROW_STATIC -DBOOST_STACKTRACE_ADDR2LINE_LOCATION=\"/usr/bin/addr2line\" -DBOOST_STACKTRACE_USE_ADDR2LINE -DBOOST_STACKTRACE_USE_BACKTRACE -DBOOST_STACKTRACE_USE_NOOP -DCURL_STATICLIB=1 -DLERC_STATIC -DLIBJPEG_STATIC -DLZMA_API_STATIC -DOSGEARTH_LIBRARY_STATIC -DOSG_LIBRARY_STATIC -DPARQUET_STATIC -DPROJ_DLL="" -DSPDLOG_COMPILED_LIB -DSPDLOG_FMT_EXTERNAL -DUSE_UNSTABLE_GEOS_CPP_API -DXML_STATIC -I/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/build/Release/build_include -I/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/src/src -I/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/build/Release/src/osgEarth -isystem /home/conan/.conan2/p/opens08f6044344f0b/p/include -isystem /home/conan/.conan2/p/sqlit6ae3bc616ab9d/p/include -isystem /home/conan/.conan2/p/zlib76e00a316e585/p/include -isystem /home/conan/.conan2/p/proto460e1423ae0e2/p/include -isystem /home/conan/.conan2/p/absei5941141b8927a/p/include -isystem /home/conan/.conan2/p/spdlo2faee3ddaa48f/p/include -isystem /home/conan/.conan2/p/fmt091cbdaf9fb57/p/include -isystem /home/conan/.conan2/p/geos4add82c1a73b6/p/include -isystem /home/conan/.conan2/p/libcu3a669845096ef/p/include -isystem /home/conan/.conan2/p/b/gdal083f507d8ea2d/p/include -isystem /home/conan/.conan2/p/lerc99e4cfa87fe41/p/include -m64 -O3 -DNDEBUG -std=c++17 -fPIC -MD -MT src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o -MF src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o.d -o src/osgEarth/CMakeFiles/osgEarth.dir/GeometryUtils.cpp.o -c /home/conan/.conan2/p/b/osgeabf18fc06a2225/b/src/src/osgEarth/GeometryUtils.cpp
In file included from /home/conan/.conan2/p/b/osgeabf18fc06a2225/b/src/src/osgEarth/GeometryUtils.cpp:7:
/home/conan/.conan2/p/b/osgeabf18fc06a2225/b/src/src/osgEarth/OgrUtils:11:2: error: #error OgrUtils is an internal-only header
   11 | #error OgrUtils is an internal-only header
      |  ^~~~~

Doing a quick search, that source file requires the preprocessor definition OSGEARTH_LIBRARY to now raise that error: https://github.com/pelicanmapping/osgearth/blob/osgearth-3.8/src/osgEarth/OgrUtils#L11

However, that definition is only applied when building shared library: https://github.com/pelicanmapping/osgearth/blob/osgearth-3.8/src/osgEarth/CMakeLists.txt#L4

Is there a way to build osgEarth as static library? Is only shared library supported?

When building as shared library that error does not happen, and I can build without errors.

You can check my full build log: osgearth-3.8-linux-amd64-gcc13-release-static-source.log

Environment

• osgEarth 3.8
• Linux Ubuntu 24.04
• GCC-13
• CPU amd64

Regards!

[gwaldron]

If you grab the master branch, that #pragma has been removed. Give that a try please.

[uilianries]

@gwaldron Thank you for your quick answer! 😄

I can confirm that when building using the master branch, the static library is built successfully!

[gwaldron]

Great. At some point we will make a 3.8.1 that includes this fix.