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lokinet/cmake/static_link.cmake
Jason Rhinelander c5faa86926 cmake refactor
Refactors many things in cmake to improve and simplify:

- don't use variable indirection for target names; target names are
*already* a variable of sorts.  (e.g. ${UTIL_LIB} is now just
lokinet-util).  cmake/basic_definitions.cmake is now gone.

- fix LTO enabling to use the standard cmake (3.9+) LTO mechanism rather
than shoving a bunch of flag hacks through link_libraries and
add_compile_options.  This also now enables LTO when building a shared
library (because previously the -flto hacks were only turned on in the
static code for some reason).

- build liblokinet as *either* shared library or static library, but not
both.  Building both makes things more complicated because they had
different names (lokinet-shared or lokinet-static) and seems pointless:
you generally want one or the other.  Now there is just the liblokinet
target, which will be shared or static depending on the value of
BUILD_SHARED_LIBS.

- Simplify lokinet-cryptography AVX2 code: just build *one* library, and
add in the additional AVX2 files when possible, rather than building two
and needing to merge them.

- Compress STATIC_LINK and STATIC_LINK_RUNTIME into just STATIC_LINK.
It makes no sense to use one of these (_RUNTIME) on Windows and the
other on non-Windows when they appear to try to do the same thing.

- remove a bunch of annotations from `endif(FOO)` -> `endif()`.

- move all the tuntap compilation code (including OS-specific source
file selection) into vendor/CMakeLists.txt and build tuntap as an
intermediate OBJECT library rather than keeping a global variable in 5
different files.

- move release motto define to root cmake; it made no sense being
duplicated in both unix.cmake and win32.cmake

- fix add_log_tag to not stomp on any existing source compile flags with
its definition.  Also use proper compile definition property instead of
cramming it into compile flags.

- make optimization/linker flags less hacky.  There's no reason for us
to force particular optimization flags because the cmake build type
already does that (e.g. -DCMAKE_BUILD_TYPE=Release does -O3).  Not doing
that also silences a bunch of cmake warnings because it thinks "-O0 -g3"
etc.  are link libraries (which is reasonable: that's what the code was
telling cmake they are).

- sets the default build type to RelWithDebInfo which gives us `-O2 -g`
if you don't specify a build type.

- Move PIC up (so that the things loaded in unix.cmake, notably libuv,
have it set).

- Add a custom `curl` interface library that carries the correct link
target and include paths for curl (system or bundled).
2020-05-17 23:31:23 -03:00

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183 B
CMake

if(STATIC_LINK)
if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
link_libraries( -static-libstdc++ )
else()
link_libraries( -static-libstdc++ -static-libgcc )
endif()
endif()