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| author | Jonas Hahnfeld <Hahnfeld@itc.rwth-aachen.de> | 2016-07-27 08:15:54 +0000 |
|---|---|---|
| committer | Jonas Hahnfeld <Hahnfeld@itc.rwth-aachen.de> | 2016-07-27 08:15:54 +0000 |
| commit | 781609faebe8b7d0ce805e7e5828dd563c1e89dd (patch) | |
| tree | 2a1acaa2c1e80a81a7afc517263c2be54e0bcea6 /CMakeLists.txt | |
| parent | 57d0d311322c8cfc8516ce35279881f0773d8564 (diff) | |
Support setting default value for -rtlib at build time
This patch introduces a new cmake variable: CLANG_DEFAULT_RTLIB, thru
which we can specify a default value for -rtlib (libgcc or
compiler-rt) at build time, just like how we set the default C++
stdlib thru CLANG_DEFAULT_CXX_STDLIB.
With these two options, we can configure clang to build binaries on
Linux that have no runtime dependence on any gcc libs (libstdc++ or
libgcc_s).
Patch by Lei Zhang!
Differential Revision: https://reviews.llvm.org/D22663
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@276848 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 0a2dccb0b5..2359360207 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -193,12 +193,23 @@ set(ENABLE_X86_RELAX_RELOCATIONS OFF CACHE BOOL "enable x86 relax relocations by default") set(CLANG_DEFAULT_CXX_STDLIB "" CACHE STRING - "Default C++ stdlib to use (empty for platform default, \"libstdc++\" or \"libc++\"") + "Default C++ stdlib to use (\"libstdc++\" or \"libc++\", empty for platform default") if (NOT(CLANG_DEFAULT_CXX_STDLIB STREQUAL "" OR CLANG_DEFAULT_CXX_STDLIB STREQUAL "libstdc++" OR CLANG_DEFAULT_CXX_STDLIB STREQUAL "libc++")) message(WARNING "Resetting default C++ stdlib to use platform default") - set(CLANG_DEFAULT_CXX_STDLIB "") + set(CLANG_DEFAULT_CXX_STDLIB "" CACHE STRING + "Default C++ stdlib to use (\"libstdc++\" or \"libc++\", empty for platform default" FORCE) +endif() + +set(CLANG_DEFAULT_RTLIB "" CACHE STRING + "Default runtime library to use (\"libgcc\" or \"compiler-rt\", empty for platform default)") +if (NOT(CLANG_DEFAULT_RTLIB STREQUAL "" OR + CLANG_DEFAULT_RTLIB STREQUAL "libgcc" OR + CLANG_DEFAULT_RTLIB STREQUAL "compiler-rt")) + message(WARNING "Resetting default rtlib to use platform default") + set(CLANG_DEFAULT_RTLIB "" CACHE STRING + "Default runtime library to use (\"libgcc\" or \"compiler-rt\", empty for platform default)" FORCE) endif() set(CLANG_DEFAULT_OPENMP_RUNTIME "libomp" CACHE STRING |