Fix all the CMake code that can only handle -stdlib= but not --stdlib=
There are several places in LLVM's CMake setup that try to remove the
`stdlib=...` flag from the CMake flags. All this code however only considered
the `-stdlib=` variant of the flag but not the alternative spelling with a
double dash. This causes that when one adds `--stdlib=...` to the user-provided
CMake flags that this gets transformed into just `-` which ends up causing the
build system to think it should read the source from stdin (which then lead to
very confusing build errors).
This just adds the alternative spelling before the`-stdlib=` variant in all
these places
Reviewed By: ldionne
Differential Revision: https://reviews.llvm.org/D87133
GitOrigin-RevId: 6b7a49bb43d58c2c08fddb9f6c538ee52806de0a
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7851f3e..ebe9e44 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -321,6 +321,8 @@
if (LIBUNWIND_HAS_NOSTDINCXX_FLAG)
list(APPEND LIBUNWIND_COMPILE_FLAGS -nostdinc++)
# Remove -stdlib flags to prevent them from causing an unused flag warning.
+ string(REPLACE "--stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+ string(REPLACE "--stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
endif()
