libc/picolibc: Don't enable malloc by default

When malloc is included in the build, the heap initialization code will be pulled in even if the application doesn't actually use malloc. This increases the size of executables by a few hundred bytes and delays system startup. Removing the 'imply COMMON_LIBC_MALLOC' statement from the PICOLIBC config and require applications using malloc to explicitly depend on it. Signed-off-by: Keith Packard <[email protected]>
zephyrproject-rtos · Sep 28, 2023 · 5667746 · 5667746
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commit 5667746
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diff --git a/lib/libc/Kconfig b/lib/libc/Kconfig
@@ -74,7 +74,6 @@ config PICOLIBC
 	select COMMON_LIBC_ABORT
 	select THREAD_LOCAL_STORAGE if ARCH_HAS_THREAD_LOCAL_STORAGE && TOOLCHAIN_SUPPORTS_THREAD_LOCAL_STORAGE
 	select LIBC_ERRNO if THREAD_LOCAL_STORAGE
-	imply COMMON_LIBC_MALLOC
 	depends on !NATIVE_APPLICATION
 	depends on PICOLIBC_SUPPORTED
 	help