On QNX using the following testdir:
$ gnulib-tool --create-testdir --dir testdir1 getprogname
I see the following:
$ ./configure | grep getprogname
checking for getprogname... yes
$ make
[...]
gcc -DHAVE_CONFIG_H -DEXEEXT=\"\" -I. -I.. -DGNULIB_STRICT_CHECKING=1
-DIN_GNULIB_TESTS=1 -I. -I. -I.. -I./.. -I../gllib -I./../gllib -Wno-error
-Wno-error -I/usr/include -D_QNX_SOURCE --sysroot=/ -MT test-getprogname.o -MD
-MP -MF $depbase.Tpo -c -o test-getprogname.o test-getprogname.c &&\
mv -f $depbase.Tpo $depbase.Po
test-getprogname.c: In function 'main':
test-getprogname.c:33:19: warning: implicit declaration of function
'getprogname' [-Wimplicit-function-declaration]
33 | char const *p = getprogname ();
| ^~~~~~~~~~~
test-getprogname.c:33:19: warning: initialization of 'const char *' from
'int' makes pointer from integer without a cast [-Wint-conversion]
[...]
This is because QNX declares it in sys/process.h which is not included
[1].
The copyright header on that file only lists 2018, so I don't think
older QNX versions have it. Therefore, I think a check is needed for it.
I haven't pushed the attached patch yet since I am not 100% sure I wrote
the include in stdlib.in.h correctly. I think the GNULIB_POSIXCHECK is
needed so we can define the warning even when the module is not used, is
that correct?
Collin
[1]
https://www.qnx.com/developers/docs/8.0/com.qnx.doc.neutrino.lib_ref/topic/g/getprogname.html
>From 23462c65bf46f0873a0a53744a10c25644b2327d Mon Sep 17 00:00:00 2001
Message-ID: <23462c65bf46f0873a0a53744a10c25644b2327d.1767248778.git.collin.fu...@gmail.com>
From: Collin Funk <[email protected]>
Date: Wed, 31 Dec 2025 22:25:46 -0800
Subject: [PATCH] getprogname: Fix missing declaration on QNX.
* lib/stdlib.in.h [@GNULIB_GETPROGNAME@ && @HAVE_SYS_PROCESS_H@]:
Include sys/process.h.
* m4/getprogname.m4 (gl_FUNC_GETPROGNAME): Check for sys/process.h.
* m4/stdlib_h.m4 (gl_STDLIB_H_DEFAULTS): Initialize HAVE_SYS_PROCESS_H
to zero.
* modules/stdlib-h (Makefile.am): Substitute HAVE_SYS_PROCESS_H.
---
ChangeLog | 8 ++++++++
lib/stdlib.in.h | 5 +++++
m4/getprogname.m4 | 8 +++++++-
m4/stdlib_h.m4 | 3 ++-
modules/stdlib-h | 1 +
5 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index fd4314ef8b..7f06949378 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
2025-12-31 Collin Funk <[email protected]>
+ getprogname: Fix missing declaration on QNX.
+ * lib/stdlib.in.h [@GNULIB_GETPROGNAME@ && @HAVE_SYS_PROCESS_H@]:
+ Include sys/process.h.
+ * m4/getprogname.m4 (gl_FUNC_GETPROGNAME): Check for sys/process.h.
+ * m4/stdlib_h.m4 (gl_STDLIB_H_DEFAULTS): Initialize HAVE_SYS_PROCESS_H
+ to zero.
+ * modules/stdlib-h (Makefile.am): Substitute HAVE_SYS_PROCESS_H.
+
inet_ntop, inet_pton: Fix a link error on QNX.
* m4/inet_ntop.m4 (gl_FUNC_INET_NTOP): Also check for inet_ntop in
libsocket.
diff --git a/lib/stdlib.in.h b/lib/stdlib.in.h
index b5ad275e5d..737675a999 100644
--- a/lib/stdlib.in.h
+++ b/lib/stdlib.in.h
@@ -70,6 +70,11 @@
# include <sys/loadavg.h>
#endif
+/* QNX declares getprogname() in <sys/process.h>. */
+#if (@GNULIB_GETPROGNAME@ || defined GNULIB_POSIXCHECK) && @HAVE_SYS_PROCESS_H@
+# include <sys/process.h>
+#endif
+
/* Native Windows platforms declare _mktemp() in <io.h>. */
#if defined _WIN32 && !defined __CYGWIN__
# include <io.h>
diff --git a/m4/getprogname.m4 b/m4/getprogname.m4
index 90f34c7439..4de888e10a 100644
--- a/m4/getprogname.m4
+++ b/m4/getprogname.m4
@@ -1,5 +1,5 @@
# getprogname.m4
-# serial 8
+# serial 9
dnl Copyright (C) 2016-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -12,6 +12,12 @@ AC_DEFUN([gl_FUNC_GETPROGNAME]
[
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_HEADERS_ONCE([sys/process.h])
+ if test $ac_cv_header_sys_process_h = yes; then
+ HAVE_SYS_PROCESS_H=1
+ else
+ HAVE_SYS_PROCESS_H=0
+ fi
gl_CHECK_FUNCS_ANDROID([getprogname], [[#include <stdlib.h>]])
if test $ac_cv_func_getprogname = no; then
HAVE_GETPROGNAME=0
diff --git a/m4/stdlib_h.m4 b/m4/stdlib_h.m4
index ab2e87019b..139626be7b 100644
--- a/m4/stdlib_h.m4
+++ b/m4/stdlib_h.m4
@@ -1,5 +1,5 @@
# stdlib_h.m4
-# serial 85
+# serial 86
dnl Copyright (C) 2007-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -223,6 +223,7 @@ AC_DEFUN([gl_STDLIB_H_DEFAULTS]
HAVE_STRTOULL=1; AC_SUBST([HAVE_STRTOULL])
HAVE_STRUCT_RANDOM_DATA=1; AC_SUBST([HAVE_STRUCT_RANDOM_DATA])
HAVE_SYS_LOADAVG_H=0; AC_SUBST([HAVE_SYS_LOADAVG_H])
+ HAVE_SYS_PROCESS_H=0; AC_SUBST([HAVE_SYS_PROCESS_H])
HAVE_UNLOCKPT=1; AC_SUBST([HAVE_UNLOCKPT])
HAVE_DECL_UNSETENV=1; AC_SUBST([HAVE_DECL_UNSETENV])
REPLACE__EXIT=0; AC_SUBST([REPLACE__EXIT])
diff --git a/modules/stdlib-h b/modules/stdlib-h
index 7f479d000c..bc1958d529 100644
--- a/modules/stdlib-h
+++ b/modules/stdlib-h
@@ -135,6 +135,7 @@ stdlib.h: stdlib.in.h $(top_builddir)/config.status $(CXXDEFS_H) \
-e 's|@''HAVE_STRTOULL''@|$(HAVE_STRTOULL)|g' \
-e 's|@''HAVE_STRUCT_RANDOM_DATA''@|$(HAVE_STRUCT_RANDOM_DATA)|g' \
-e 's|@''HAVE_SYS_LOADAVG_H''@|$(HAVE_SYS_LOADAVG_H)|g' \
+ -e 's|@''HAVE_SYS_PROCESS_H''@|$(HAVE_SYS_PROCESS_H)|g' \
-e 's|@''HAVE_UNLOCKPT''@|$(HAVE_UNLOCKPT)|g' \
-e 's|@''HAVE_DECL_UNSETENV''@|$(HAVE_DECL_UNSETENV)|g' \
< $@-t1 > $@-t2
--
2.52.0
