[PATCH] cc-can-link.sh: check for linking capability in a more robust way

[Alexey Dobriyan <adobriyan@gmail.com>]

Compiling "printf("");" doesn't necessarily check for linking capability
as printf can be optimised for constants strings even at -O0:

	0000000000401106 <main>:
	  401106:       push   rbp
	  401107:       mov    rbp,rsp
	  40110a:       mov    eax,0x0
	  40110f:       pop    rbp
	  401110:       ret

Pass something from the command line to disable optimisations:

	0000000000401126 <main>:
	  401126:       push   rbp
	  401127:       mov    rbp,rsp
	  40112a:       sub    rsp,0x10
	  40112e:       mov    DWORD PTR [rbp-0x4],edi
	  401131:       mov    QWORD PTR [rbp-0x10],rsi
	  401135:       mov    rax,QWORD PTR [rbp-0x10]
	  401139:       add    rax,0x8
	  40113d:       mov    rax,QWORD PTR [rax]
	  401140:       mov    rdi,rax
	  401143:       mov    eax,0x0
	  401148:  ***  call   401030 <printf@plt>
	  40114d:       mov    eax,0x0
	  401152:       leave
	  401153:       ret

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

 scripts/cc-can-link.sh |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/scripts/cc-can-link.sh
+++ b/scripts/cc-can-link.sh
@@ -3,9 +3,9 @@
 
 cat << "END" | $@ -x c - -o /dev/null >/dev/null 2>&1
 #include <stdio.h>
-int main(void)
+int main(int argc, char *argv[])
 {
-	printf("");
+	printf(argv[1]);
 	return 0;
 }
 END