From 7108497fda9d4536a1afade7f42266e06dca4488 Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Thu, 13 Feb 2025 22:44:48 -0800
Subject: Check that HAVE_UNISTD_H and HAVE_STDARG_H are not defined as 0.

---
 configure  | 4 ++--
 zconf.h    | 4 ++--
 zconf.h.in | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
index 393c23c..1834659 100755
--- a/configure
+++ b/configure
@@ -611,7 +611,7 @@ cat > $test.c <<EOF
 int main() { return 0; }
 EOF
 if try $CC -c $CFLAGS $test.c; then
-  sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
+  sed < zconf.h "/^#if HAVE_UNISTD_H-0.* may be/s/ HAVE_UNISTD_H-0\(.*\) may be/ 1\1 was/" > zconf.temp.h
   mv zconf.temp.h zconf.h
   echo "Checking for unistd.h... Yes." | tee -a configure.log
 else
@@ -626,7 +626,7 @@ cat > $test.c <<EOF
 int main() { return 0; }
 EOF
 if try $CC -c $CFLAGS $test.c; then
-  sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
+  sed < zconf.h "/^#if HAVE_STDARG_H-0.* may be/s/ HAVE_STDARG_H-0\(.*\) may be/ 1\1 was/" > zconf.temp.h
   mv zconf.temp.h zconf.h
   echo "Checking for stdarg.h... Yes." | tee -a configure.log
 else
diff --git a/zconf.h b/zconf.h
index d6c159a..bc3ef07 100644
--- a/zconf.h
+++ b/zconf.h
@@ -436,11 +436,11 @@ typedef uLong FAR uLongf;
    typedef unsigned long z_crc_t;
 #endif
 
-#ifdef HAVE_UNISTD_H    /* may be set to #if 1 by ./configure */
+#if HAVE_UNISTD_H-0     /* may be set to #if 1 by ./configure */
 #  define Z_HAVE_UNISTD_H
 #endif
 
-#ifdef HAVE_STDARG_H    /* may be set to #if 1 by ./configure */
+#if HAVE_STDARG_H-0     /* may be set to #if 1 by ./configure */
 #  define Z_HAVE_STDARG_H
 #endif
 
diff --git a/zconf.h.in b/zconf.h.in
index d6c159a..bc3ef07 100644
--- a/zconf.h.in
+++ b/zconf.h.in
@@ -436,11 +436,11 @@ typedef uLong FAR uLongf;
    typedef unsigned long z_crc_t;
 #endif
 
-#ifdef HAVE_UNISTD_H    /* may be set to #if 1 by ./configure */
+#if HAVE_UNISTD_H-0     /* may be set to #if 1 by ./configure */
 #  define Z_HAVE_UNISTD_H
 #endif
 
-#ifdef HAVE_STDARG_H    /* may be set to #if 1 by ./configure */
+#if HAVE_STDARG_H-0     /* may be set to #if 1 by ./configure */
 #  define Z_HAVE_STDARG_H
 #endif
 
-- 
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