1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
From: Christian Seiler <christian@iwakd.de>
Date: Fri, 3 Jun 2016 19:26:07 +0200
Subject: weak MAIN__
Make MAIN__ a weak symbol
Make MAIN__ a weak symbol, to make sure that non-f2c binaries can link
against libraries created by it. Also make main() a weak symbol, just
in case, because we really don't want to override a C program's main
routine.
Bug-Debian: https://bugs.debian.org/826253
---
main.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/main.c b/main.c
index d95fdc9..3825bf7 100644
--- a/main.c
+++ b/main.c
@@ -53,6 +53,20 @@ extern int MAIN__(void);
#define Int int
#endif
+/* Make main() a weak symbol. */
+int main(int argc, char **argv) __attribute__((weak));
+
+/* Create dummy MAIN__ function and make MAIN__ a weak alias to it.
+ * If linked against a program that exports MAIN__, i.e. one compiled
+ * by f2c, this MAIN__ will resolve to the program's MAIN__ instead,
+ * whereas normal C programs will still be able to link against this
+ * library. */
+static int weak_MAIN__()
+{
+ return -1;
+}
+extern int MAIN__() __attribute__((weak, alias("weak_MAIN__")));
+
static VOID sigfdie(Sigarg)
{
Use_Sigarg;
|
