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Subject[PATCH v3 1/4] tools/nolibc/string: export strlen()
Date
As with commit 8d304a374023, "tools/nolibc/string: export memset() and
memmove()", gcc -Os without -ffreestanding may fail to compile with:

cc -fno-asynchronous-unwind-tables -fno-ident -s -Os -nostdlib -lgcc -static -o test test.c
/usr/bin/ld: /tmp/cccIasKL.o: in function `main':
test.c:(.text.startup+0x1e): undefined reference to `strlen'
collect2: error: ld returned 1 exit status

As on the aforementioned commit, this patch adds a section to export
this function so compilation works on those cases too.

Signed-off-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
---
tools/include/nolibc/string.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/include/nolibc/string.h b/tools/include/nolibc/string.h
index a01c69dd495f..ed15c22b1b2a 100644
--- a/tools/include/nolibc/string.h
+++ b/tools/include/nolibc/string.h
@@ -123,7 +123,7 @@ char *strcpy(char *dst, const char *src)
* thus itself, hence the asm() statement below that's meant to disable this
* confusing practice.
*/
-static __attribute__((unused))
+__attribute__((weak,unused,section(".text.nolibc_strlen")))
size_t strlen(const char *str)
{
size_t len;
--
2.43.0

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