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fix(gawk-4.2.1): add C23-compatible readfunc prototype patch

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vxtls 2026-03-01 21:21:42 -05:00
parent beb9fb12f9
commit 5e4c88782f
1 changed files with 64 additions and 0 deletions
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64
steps-guix/gawk-4.2.1/patches/fix-readfunc-prototype-c23.patch Normal file
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@ -0,0 +1,64 @@
SPDX-License-Identifier: GPL-3.0-or-later
Use an explicit function pointer prototype for readfunc so gawk 4.2.1
builds with modern C compilers where an empty parameter list is treated
as a no-argument function.
--- gawk-4.2.1/awkgram.y
+++ gawk-4.2.1/awkgram.y
@@ -2870,22 +2870,17 @@
struct stat sbuf;
/*
- * No argument prototype on readfunc on purpose,
- * avoids problems with some ancient systems where
- * the types of arguments to read() aren't up to date.
+ * Use an explicit prototype so modern C compilers (C23 and newer)
+ * do not treat an empty parameter list as a no-argument function.
*/
- static ssize_t (*readfunc)() = 0;
+ static ssize_t (*readfunc)(int, void *, size_t) = NULL;
if (readfunc == NULL) {
char *cp = getenv("AWKREADFUNC");
/* If necessary, one day, test value for different functions. */
if (cp == NULL)
- /*
- * cast is to remove warnings on systems with
- * different return types for read.
- */
- readfunc = ( ssize_t(*)() ) read;
+ readfunc = read;
else
readfunc = read_one_line;
}
--- gawk-4.2.1/awkgram.c
+++ gawk-4.2.1/awkgram.c
@@ -5290,22 +5290,17 @@
struct stat sbuf;
/*
- * No argument prototype on readfunc on purpose,
- * avoids problems with some ancient systems where
- * the types of arguments to read() aren't up to date.
+ * Use an explicit prototype so modern C compilers (C23 and newer)
+ * do not treat an empty parameter list as a no-argument function.
*/
- static ssize_t (*readfunc)() = 0;
+ static ssize_t (*readfunc)(int, void *, size_t) = NULL;
if (readfunc == NULL) {
char *cp = getenv("AWKREADFUNC");
/* If necessary, one day, test value for different functions. */
if (cp == NULL)
- /*
- * cast is to remove warnings on systems with
- * different return types for read.
- */
- readfunc = ( ssize_t(*)() ) read;
+ readfunc = read;
else
readfunc = read_one_line;
}