[exim-cvs] Rely on system prototypes if we #define our os fu…

Gitweb: http://git.exim.org/exim.git/commitdiff/b52ce0604579f50b71e7527e5030dfb3f74c618b

Commit:     b52ce0604579f50b71e7527e5030dfb3f74c618b
Parent:     4e7ee01264c430b044fd81cbc79a09ee0348d018
Author:     Phil Pennock <pdp@???>
AuthorDate: Sat Mar 26 00:32:44 2011 -0400
Committer:  Phil Pennock <pdp@???>
CommitDate: Sat Mar 26 00:32:44 2011 -0400

    Rely on system prototypes if we #define our os funcs.

    The const-ness updates broke systems where `os_strsignal()` gets mapped
    to `strsignal()`, which does *not* return `const char *` but `char *`.

    If we #define away, then there should be a prototype from the system
    headers.
---
 src/src/osfunctions.h |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/src/src/osfunctions.h b/src/src/osfunctions.h
index 19b5808..14111d3 100644
--- a/src/src/osfunctions.h
+++ b/src/src/osfunctions.h
@@ -14,10 +14,25 @@ that uses a type that isn't defined for them. */
extern ip_address_item *os_common_find_running_interfaces(void);
#endif

+/* If these exist as a macro, then they're overriden away from us and we
+rely upon the system headers to provide prototype declarations for us.
+Notably, strsignal() is not in the Single Unix Specification (v3) and
+predicting constness is awkward. */
+
+#ifndef os_getloadavg
 extern int           os_getloadavg(void);
+#endif
+#ifndef os_restarting_signal
 extern void          os_restarting_signal(int, void (*)(int));
+#endif
+#ifndef os_non_restarting_signal
 extern void          os_non_restarting_signal(int, void (*)(int));
+#endif
+#ifndef os_strexit
 extern const char   *os_strexit(int);     /* char to match os_strsignal */
+#endif
+#ifndef os_strsignal
 extern const char   *os_strsignal(int);   /* char to match strsignal in some OS */
+#endif

/* End of osfunctions.h */