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Use correct clang flag for size optimization

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See https://clang.llvm.org/docs/CommandGuide/clang.html:
>> Code Generation Options
>>   -Oz Like -Os (and thus -O2), but reduces code size further.

Without -Oz enabled clang produced binaries that were too large.
This commit is contained in:
Alexey Storozhev 2023-10-23 13:28:49 +01:00 committed by Marius Vikhammer
parent a1e45ac2cc
commit 2d463ad18b
1 changed files with 10 additions and 2 deletions
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12
CMakeLists.txt
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@ -16,7 +16,11 @@ endif()
if(NOT BOOTLOADER_BUILD)
if(CONFIG_COMPILER_OPTIMIZATION_SIZE)
list(APPEND compile_options "-Os")
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
list(APPEND compile_options "-Oz")
else()
list(APPEND compile_options "-Os")
endif()
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
list(APPEND compile_options "-freorder-blocks")
endif()
@ -34,7 +38,11 @@ if(NOT BOOTLOADER_BUILD)
else() # BOOTLOADER_BUILD
if(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_SIZE)
list(APPEND compile_options "-Os")
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
list(APPEND compile_options "-Oz")
else()
list(APPEND compile_options "-Os")
endif()
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
list(APPEND compile_options "-freorder-blocks")
endif()