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fix(cmake): Fixed linker not supporting -warn_commons for linux target on MacOS

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This commit updates the ld linker flags to conditionally include the
-warn_commons flag when the linux target is built on MacOS. This is
because, not all versions of ld support the -warn_commons option.

Closes https://github.com/espressif/esp-idf/issues/13185
This commit is contained in:
Sudeep Mohanty 2024-08-14 14:56:42 +02:00 committed by BOT
parent ed4220c163
commit d87171a2f1
1 changed files with 28 additions and 1 deletions
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29
CMakeLists.txt
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@ -198,8 +198,35 @@ endif()
list(APPEND link_options "-fno-lto")
if(CONFIG_IDF_TARGET_LINUX AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
list(APPEND link_options "-Wl,-dead_strip")
# Not all versions of the MacOS linker support the -warn_commons flag.
# ld version 1053.12 (and above) have been tested to support it.
# Hence, we extract the version string from the linker output
# before including the flag.
# Get the ld version, capturing both stdout and stderr
execute_process(
COMMAND ${CMAKE_LINKER} -v
OUTPUT_VARIABLE LD_VERSION_OUTPUT
ERROR_VARIABLE LD_VERSION_ERROR
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_STRIP_TRAILING_WHITESPACE
)
# Combine stdout and stderr
set(LD_VERSION_OUTPUT "${LD_VERSION_OUTPUT}\n${LD_VERSION_ERROR}")
# Extract the version string
string(REGEX MATCH "PROJECT:(ld|dyld)-([0-9]+)\\.([0-9]+)" LD_VERSION_MATCH "${LD_VERSION_OUTPUT}")
set(LD_VERSION_MAJOR_MINOR "${CMAKE_MATCH_2}.${CMAKE_MATCH_3}")
message(STATUS "Linker Version: ${LD_VERSION_MAJOR_MINOR}")
# Compare the version with 1053.12
if(LD_VERSION_MAJOR_MINOR VERSION_GREATER_EQUAL "1053.12")
list(APPEND link_options "-Wl,-warn_commons")
endif()
list(APPEND link_options "-Wl,-dead_strip")
else()
list(APPEND link_options "-Wl,--gc-sections")
list(APPEND link_options "-Wl,--warn-common")