diff options
| author |  Abseil Team <absl-team@google.com> | 2022-09-06 13:11:28 -0700 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2022-09-06 13:12:23 -0700 |
| commit | 308bbf300fe9332130f4784c7a91fa2ad707d6e4 (patch) | |
| tree | aeb8bd89fc3891ada12b6c4dbbf2425f8e37d983 /CMakeLists.txt | |
| parent | d3c00b06b334311e23ab18f5d2b90938a07ce35d (diff) | |
CMake: install artifacts reflect the compiled ABI
Change `absl/base/options.h` at install time to reflect the ABI used
to compile the libraries, i.e., if Abseil was compiled with
C++ >= 17 then the `ABSL_OPTION_USE_STD_*` macros are set to `1`,
because then the C++ 17 types are embedded in the ABI of the installed
artifacts.
Likewise, set the `target_compile_features()` of Abseil libraries
to reflect the C++ version used to compile them. If they the Abseil
libraries are compiled with C++ >= 17, then all downstream
dependencies must also be compiled with C++ >= 17.
Fixes #696
PiperOrigin-RevId: 472538165
Change-Id: Ic9e346ebe277c882a18ad96e1918c9e3511c91c3
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 706af68a..016dd917 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -46,6 +46,11 @@ if (POLICY CMP0091) cmake_policy(SET CMP0091 NEW) endif (POLICY CMP0091) +# try_compile() honors the CMAKE_CXX_STANDARD value +if (POLICY CMP0067) + cmake_policy(SET CMP0067 NEW) +endif (POLICY CMP0067) + project(absl LANGUAGES CXX) include(CTest) @@ -229,4 +234,25 @@ if(ABSL_ENABLE_INSTALL) PATTERN "copts" EXCLUDE PATTERN "testdata" EXCLUDE ) + + file(READ "absl/base/options.h" ABSL_INTERNAL_OPTIONS_H_CONTENTS) + if (ABSL_INTERNAL_AT_LEAST_CXX17) + string(REGEX REPLACE + "#define ABSL_OPTION_USE_STD_([^ ]*) 2" + "#define ABSL_OPTION_USE_STD_\\1 1" + ABSL_INTERNAL_OPTIONS_H_PINNED + "${ABSL_INTERNAL_OPTIONS_H_CONTENTS}") + else() + string(REGEX REPLACE + "#define ABSL_OPTION_USE_STD_([^ ]*) 2" + "#define ABSL_OPTION_USE_STD_\\1 0" + ABSL_INTERNAL_OPTIONS_H_PINNED + "${ABSL_INTERNAL_OPTIONS_H_CONTENTS}") + endif() + file(WRITE "${CMAKE_BINARY_DIR}/options-pinned.h" "${ABSL_INTERNAL_OPTIONS_H_PINNED}") + + install(FILES "${CMAKE_BINARY_DIR}/options-pinned.h" + DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/absl/base + RENAME "options.h") + endif() # ABSL_ENABLE_INSTALL |