https://bugs.gentoo.org/879883
https://github.com/madler/zlib/issues/751

From 2ad2713e6cb9166dcede9a020f6913b8189ff0c6 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Wed, 23 Nov 2022 04:17:16 +0000
Subject: [PATCH] Revert "Turn off RWX segment warnings on sparc systems."

This breaks building on sparc with older binutils.

This reverts commit 29fd715fd0bdaffee21e2d2d37be8c5a6ac67ee4.
--- a/Makefile.in
+++ b/Makefile.in
@@ -22,7 +22,7 @@ CFLAGS=-O
 
 SFLAGS=-O
 LDFLAGS=
-TEST_LDFLAGS=$(LDFLAGS) -L. libz.a
+TEST_LDFLAGS=-L. libz.a
 LDSHARED=$(CC)
 CPP=$(CC) -E
 
@@ -288,10 +288,10 @@ minigzip$(EXE): minigzip.o $(STATICLIB)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(TEST_LDFLAGS)
 
 examplesh$(EXE): example.o $(SHAREDLIBV)
-	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS) -L. $(SHAREDLIBV)
+	$(CC) $(CFLAGS) -o $@ example.o -L. $(SHAREDLIBV)
 
 minigzipsh$(EXE): minigzip.o $(SHAREDLIBV)
-	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS) -L. $(SHAREDLIBV)
+	$(CC) $(CFLAGS) -o $@ minigzip.o -L. $(SHAREDLIBV)
 
 example64$(EXE): example64.o $(STATICLIB)
 	$(CC) $(CFLAGS) -o $@ example64.o $(TEST_LDFLAGS)
--- a/configure
+++ b/configure
@@ -33,10 +33,7 @@ fi
 # set command prefix for cross-compilation
 if [ -n "${CHOST}" ]; then
     uname=${CHOST}
-    mname=${CHOST}
     CROSS_PREFIX="${CHOST}-"
-else
-    mname=`(uname -a || echo unknown) 2>/dev/null`
 fi
 
 # destination name for static library
@@ -223,10 +220,6 @@ if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
   fi
   case "$uname" in
   Linux* | linux* | *-linux* | GNU | GNU/* | solaris*)
-        case "$mname" in
-        *sparc*)
-            LDFLAGS="${LDFLAGS} -Wl,--no-warn-rwx-segments" ;;
-        esac
         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"} ;;
   *BSD | *bsd* | DragonFly)
         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"}