From: Rodrigo Campos <rodrigo@sdfg.com.ar>
Date: Sun, 18 Feb 2024 19:51:03 +0000 (-0300)
Subject: tools/nolibc/string: export strlen()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=689230b674188163fe56b3aecd7d01f79ca518e6;p=linux.git

tools/nolibc/string: export strlen()

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>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---

diff --git a/tools/include/nolibc/string.h b/tools/include/nolibc/string.h
index a01c69dd495f5..ed15c22b1b2ae 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;