[PATCH] util/zlib-extra: de-inline gzerror_str

[David Bremner <david@tethera.net>]

It turns out the behaviour of inline functions in C header files is
not a good idea, and can cause linking problems if the compiler
decides not to inline them.  In principle this is solvable by using a
"static inline" declaration, but this potentially makes a copy in
every compilation unit. Since we don't actually care about the
performance of this function, just use a non-inline function.
---
 util/zlib-extra.c | 7 +++++++
 util/zlib-extra.h | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/util/zlib-extra.c b/util/zlib-extra.c
index 2d2d2414..3a75e504 100644
--- a/util/zlib-extra.c
+++ b/util/zlib-extra.c
@@ -85,3 +85,10 @@ gz_error_string (util_status_t status, gzFile file)
     else
 	return util_error_string (status);
 }
+
+const char *
+gzerror_str(gzFile file)
+{
+    int dummy;
+    return gzerror (file, &dummy);
+}
diff --git a/util/zlib-extra.h b/util/zlib-extra.h
index 296dc914..e9925c98 100644
--- a/util/zlib-extra.h
+++ b/util/zlib-extra.h
@@ -29,8 +29,8 @@ gz_error_string (util_status_t status, gzFile stream);
 
 /* Call gzerror with a dummy errno argument, the docs don't promise to
  * support the NULL case */
-inline const char *
-gzerror_str(gzFile file) { int dummy; return gzerror (file, &dummy); }
+const char *
+gzerror_str(gzFile file);
 
 #ifdef __cplusplus
 }
-- 
2.26.2