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authorEric Andersen <andersen@codepoet.org>2002-04-14 03:32:14 +0000
committerEric Andersen <andersen@codepoet.org>2002-04-14 03:32:14 +0000
commit5ce9147ea3796f0dca7f8fffce8b4c398eb08915 (patch)
tree2be24c643076c82822ab78c0bd07ab74a48ec9f0 /libc/sysdeps/linux/powerpc
parented44f35a1aa84c6e42dac46aab75e9f8fcc6d7b7 (diff)
Manuel and I were looking into a problem with applications failing to link
(undefined reference to `main') when the .o file containing main was contained in an static library(a '.a' ar archive). It turns out that due to its single pass nature, GNU ld was failing to pull it into the build. This sticks a dummy reference to main() into crt0.o, so that when an application is linked with the main() function in a static library, we can be sure that main() actually gets linked in. -Erik
Diffstat (limited to 'libc/sysdeps/linux/powerpc')
-rw-r--r--libc/sysdeps/linux/powerpc/crt0.S8
-rw-r--r--libc/sysdeps/linux/powerpc/crt0.c4
2 files changed, 11 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/powerpc/crt0.S b/libc/sysdeps/linux/powerpc/crt0.S
index ea71667d3..11738ad5b 100644
--- a/libc/sysdeps/linux/powerpc/crt0.S
+++ b/libc/sysdeps/linux/powerpc/crt0.S
@@ -54,4 +54,10 @@ _start:
add 5,5,0
bl __uClibc_main
-
+
+/* Stick in a dummy reference to main(), so that if an application
+ * is linking when the main() function is in a static library (.a)
+ * we can be sure that main() actually gets linked in */
+L_dummy_main_reference:
+ .long main
+
diff --git a/libc/sysdeps/linux/powerpc/crt0.c b/libc/sysdeps/linux/powerpc/crt0.c
index a2615b02a..f577a5ae1 100644
--- a/libc/sysdeps/linux/powerpc/crt0.c
+++ b/libc/sysdeps/linux/powerpc/crt0.c
@@ -53,6 +53,10 @@ void _start2(void)
p=((void *)p)+0x10;
argc=*(int *)p;
}
+ /* Stick in a dummy reference to main(), so that if an application
+ * is linking when the main() function is in a static library (.a)
+ * we can be sure that main() actually gets linked in */
+ volatile void (*mainp)(int argc,void *argv,void *envp) = main;
__uClibc_main(argc,p+1,p+2+argc);
}