diff --git a/0002-zsh-Use-int-main-in-test-c-codes.patch b/0002-zsh-Use-int-main-in-test-c-codes.patch
new file mode 100644
index 0000000..3585cc4
--- /dev/null
+++ b/0002-zsh-Use-int-main-in-test-c-codes.patch
@@ -0,0 +1,541 @@
+commit ab4d62eb975a4c4c51dd35822665050e2ddc6918
+Author: Nicholas Vinson <nvinson234@gmail.com>
+Date:   Wed Sep 21 09:22:11 2022 +0900
+
+    50641: use 'int main()' in test C-codes in configure
+
+diff --git a/aczsh.m4 b/aczsh.m4
+index 1209ac614..b31236020 100644
+--- a/aczsh.m4
++++ b/aczsh.m4
+@@ -44,6 +44,7 @@ AC_DEFUN(zsh_64_BIT_TYPE,
+ #include <sys/types.h>
+ #endif
+ 
++int
+ main()
+ {
+   $1 foo = 0; 
+@@ -118,7 +119,6 @@ AC_TRY_COMMAND($DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o $LIBS
+ AC_TRY_COMMAND($CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&AS_MESSAGE_LOG_FD) &&
+ AC_TRY_COMMAND($DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o $LIBS 1>&AS_MESSAGE_LOG_FD); then
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -146,29 +146,30 @@ char *zsh_gl_sym_addr ;
+ #define RTLD_GLOBAL 0
+ #endif
+ 
++int
+ main()
+ {
+     void *handle1, *handle2;
+     void *(*zsh_getaddr1)(), *(*zsh_getaddr2)();
+     void *sym1, *sym2;
+     handle1 = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle1) exit(1);
++    if(!handle1) return(1);
+     handle2 = dlopen("./conftest2.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle2) exit(1);
++    if(!handle2) return(1);
+     zsh_getaddr1 = (void *(*)()) dlsym(handle1, "${us}zsh_getaddr1");
+     zsh_getaddr2 = (void *(*)()) dlsym(handle2, "${us}zsh_getaddr2");
+     sym1 = zsh_getaddr1();
+     sym2 = zsh_getaddr2();
+-    if(!sym1 || !sym2) exit(1);
+-    if(sym1 != sym2) exit(1);
++    if(!sym1 || !sym2) return(1);
++    if(sym1 != sym2) return(1);
+     dlclose(handle1);
+     handle1 = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle1) exit(1);
++    if(!handle1) return(1);
+     zsh_getaddr1 = (void *(*)()) dlsym(handle1, "${us}zsh_getaddr1");
+     sym1 = zsh_getaddr1();
+-    if(!sym1) exit(1);
+-    if(sym1 != sym2) exit(1);
+-    exit(0);
++    if(!sym1) return(1);
++    if(sym1 != sym2) return(1);
++    return(0);
+ }
+ ]])],[zsh_cv_shared_$1=yes],
+ [zsh_cv_shared_$1=no],
+@@ -200,7 +201,6 @@ AC_TRY_COMMAND($DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o $LIBS
+ AC_TRY_COMMAND($CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&AS_MESSAGE_LOG_FD) &&
+ AC_TRY_COMMAND($DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o $LIBS 1>&AS_MESSAGE_LOG_FD); then
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -228,19 +228,19 @@ char *zsh_gl_sym_addr ;
+ #define RTLD_GLOBAL 0
+ #endif
+ 
+-
++int
+ main()
+ {
+     void *handle1, *handle2;
+     int (*fred1)(), (*fred2)();
+     handle1 = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle1) exit(1);
++    if(!handle1) return(1);
+     handle2 = dlopen("./conftest2.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle2) exit(1);
++    if(!handle2) return(1);
+     fred1 = (int (*)()) dlsym(handle1, "${us}fred");
+     fred2 = (int (*)()) dlsym(handle2, "${us}fred");
+-    if(!fred1 || !fred2) exit(1);
+-    exit((*fred1)() != 42 || (*fred2)() != 69);
++    if(!fred1 || !fred2) return(1);
++    return((*fred1)() != 42 || (*fred2)() != 69);
+ }
+ ]])],[zsh_cv_sys_dynamic_clash_ok=yes],
+ [zsh_cv_sys_dynamic_clash_ok=no],
+@@ -276,7 +276,6 @@ AC_TRY_COMMAND($DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o $LIBS
+ AC_TRY_COMMAND($CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&AS_MESSAGE_LOG_FD) &&
+ AC_TRY_COMMAND($DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o $LIBS 1>&AS_MESSAGE_LOG_FD); then
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -304,17 +303,18 @@ char *zsh_gl_sym_addr ;
+ #define RTLD_GLOBAL 0
+ #endif
+ 
++int
+ main()
+ {
+     void *handle;
+     int (*barneysym)();
+     handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle) exit(1);
++    if(!handle) return(1);
+     handle = dlopen("./conftest2.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle) exit(1);
++    if(!handle) return(1);
+     barneysym = (int (*)()) dlsym(handle, "${us}barney");
+-    if(!barneysym) exit(1);
+-    exit((*barneysym)() != 69);
++    if(!barneysym) return(1);
++    return((*barneysym)() != 69);
+ }
+ ]])],[zsh_cv_sys_dynamic_rtld_global=yes],
+ [zsh_cv_sys_dynamic_rtld_global=no],
+@@ -346,7 +346,6 @@ AC_TRY_COMMAND($DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o $LIBS
+     save_ldflags=$LDFLAGS
+     LDFLAGS="$LDFLAGS $EXTRA_LDFLAGS"
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -374,15 +373,16 @@ char *zsh_gl_sym_addr ;
+ #define RTLD_GLOBAL 0
+ #endif
+ 
++int
+ main()
+ {
+     void *handle;
+     int (*barneysym)();
+     handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle) exit(1);
++    if(!handle) return(1);
+     barneysym = (int (*)()) dlsym(handle, "${us}barney");
+-    if(!barneysym) exit(1);
+-    exit((*barneysym)() != 69);
++    if(!barneysym) return(1);
++    return((*barneysym)() != 69);
+ }
+ 
+ int fred () { return 42; }
+@@ -420,7 +420,6 @@ elif
+     save_ldflags=$LDFLAGS
+     LDFLAGS="$LDFLAGS $EXTRA_LDFLAGS -s"
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -448,15 +447,16 @@ char *zsh_gl_sym_addr ;
+ #define RTLD_GLOBAL 0
+ #endif
+ 
++int
+ main()
+ {
+     void *handle;
+     int (*barneysym)();
+     handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle) exit(1);
++    if(!handle) return(1);
+     barneysym = (int (*)()) dlsym(handle, "${us}barney");
+-    if(!barneysym) exit(1);
+-    exit((*barneysym)() != 69);
++    if(!barneysym) return(1);
++    return((*barneysym)() != 69);
+ }
+ 
+ int fred () { return 42; }
+@@ -488,7 +488,6 @@ echo 'int fred () { return 42; }' > conftest1.c
+ if AC_TRY_COMMAND($CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&AS_MESSAGE_LOG_FD) &&
+ AC_TRY_COMMAND($DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS -s conftest1.o $LIBS 1>&AS_MESSAGE_LOG_FD); then
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -516,15 +515,16 @@ char *zsh_gl_sym_addr ;
+ #define RTLD_GLOBAL 0
+ #endif
+ 
++int
+ main()
+ {
+     void *handle;
+     int (*fredsym)();
+     handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
+-    if(!handle) exit(1);
++    if(!handle) return(1);
+     fredsym = (int (*)()) dlsym(handle, "${us}fred");
+-    if(!fredsym) exit(1);
+-    exit((*fredsym)() != 42);
++    if(!fredsym) return(1);
++    return((*fredsym)() != 42);
+ }
+ ]])],[zsh_cv_sys_dynamic_strip_lib=yes],
+ [zsh_cv_sys_dynamic_strip_lib=no],
+diff --git a/configure.ac b/configure.ac
+index 890ef8dd2..074141d38 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -585,7 +585,7 @@ fi
+ dnl  Checking if compiler correctly cast signed to unsigned.
+ AC_CACHE_CHECK(if signed to unsigned casting is broken,
+ zsh_cv_c_broken_signed_to_unsigned_casting,
+-[AC_RUN_IFELSE([AC_LANG_SOURCE([[main(){return((int)(unsigned char)((char) -1) == 255);}]])],[zsh_cv_c_broken_signed_to_unsigned_casting=yes],[zsh_cv_c_broken_signed_to_unsigned_casting=no],[zsh_cv_c_broken_signed_to_unsigned_casting=no])])
++[AC_RUN_IFELSE([AC_LANG_SOURCE([[int main(){return((int)(unsigned char)((char) -1) == 255);}]])],[zsh_cv_c_broken_signed_to_unsigned_casting=yes],[zsh_cv_c_broken_signed_to_unsigned_casting=no],[zsh_cv_c_broken_signed_to_unsigned_casting=no])])
+ AH_TEMPLATE([BROKEN_SIGNED_TO_UNSIGNED_CASTING],
+ [Define to 1 if compiler incorrectly cast signed to unsigned.])
+ if test x$zsh_cv_c_broken_signed_to_unsigned_casting = xyes; then
+@@ -1046,7 +1046,7 @@ else
+   [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <sys/types.h>
+ 
+-main() { return sizeof(off_t) < 8; }
++int main() { return sizeof(off_t) < 8; }
+ ]])],[zsh_cv_off_t_is_64_bit=yes],[zsh_cv_off_t_is_64_bit=no],[zsh_cv_off_t_is_64_bit=no])])
+   if test x$zsh_cv_off_t_is_64_bit = xyes; then
+     AC_DEFINE(OFF_T_IS_64_BIT)
+@@ -1056,7 +1056,7 @@ main() { return sizeof(off_t) < 8; }
+   [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <sys/types.h>
+ 
+-main() { return sizeof(ino_t) < 8; }
++int main() { return sizeof(ino_t) < 8; }
+ ]])],[zsh_cv_ino_t_is_64_bit=yes],[zsh_cv_ino_t_is_64_bit=no],[zsh_cv_ino_t_is_64_bit=no])])
+   if test x$zsh_cv_ino_t_is_64_bit = xyes; then
+     AC_DEFINE(INO_T_IS_64_BIT)
+@@ -1369,7 +1369,7 @@ zsh_cv_func_realpath_accepts_null,
+ #include <stdlib.h>
+ #include <limits.h>
+ ],[
+-exit(!realpath("/", (char*)0));
++return(!realpath("/", (char*)0));
+ ])],
+ [zsh_cv_func_realpath_accepts_null=yes],
+ [zsh_cv_func_realpath_accepts_null=no],
+@@ -1393,10 +1393,9 @@ AC_CACHE_CHECK(if tgetent accepts NULL,
+ zsh_cv_func_tgetent_accepts_null,
+ [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <fcntl.h>
+-#include <stdlib.h>
+ int tgetent(char *, char *);
+ char *tgetstr(char *, char **);
+-main()
++int main()
+ {
+     char buf[4096];
+     int r1 = tgetent(buf, "vt100");
+@@ -1407,7 +1406,7 @@ main()
+     	tgetstr("cl", &u);
+ 	creat("conftest.tgetent", 0640);
+     }
+-    exit((r1 != r2) || r2 == -1);
++    return((r1 != r2) || r2 == -1);
+ }
+ ]])],[if test -f conftest.tgetent; then
+     zsh_cv_func_tgetent_accepts_null=yes
+@@ -1421,10 +1420,9 @@ AC_CACHE_CHECK(if tgetent returns 0 on success,
+ zsh_cv_func_tgetent_zero_success,
+ [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <fcntl.h>
+-#include <stdlib.h>
+ int tgetent(char *, char*);
+ char *tgetstr(char *, char **);
+-main()
++int main()
+ {
+     char buf[4096];
+     int r1 = tgetent(buf, "!@#$%^&*");
+@@ -1435,7 +1433,7 @@ main()
+     	tgetstr("cl", &u);
+ 	creat("conftest.tgetent0", 0640);
+     }
+-    exit(r1 == r2);
++    return(r1 == r2);
+ }
+ ]])],[if test -f conftest.tgetent0; then
+     zsh_cv_func_tgetent_zero_success=yes
+@@ -1869,8 +1867,7 @@ zsh_cv_rlim_t_is_longer,
+ #include <sys/time.h>
+ #endif
+ #include <sys/resource.h>
+-#include <stdlib.h>
+-main(){struct rlimit r;exit(sizeof(r.rlim_cur) <= sizeof(long));}]])],[zsh_cv_rlim_t_is_longer=yes],[zsh_cv_rlim_t_is_longer=no],[zsh_cv_rlim_t_is_longer=yes])])
++int main(){struct rlimit r;return(sizeof(r.rlim_cur) <= sizeof(long));}]])],[zsh_cv_rlim_t_is_longer=yes],[zsh_cv_rlim_t_is_longer=no],[zsh_cv_rlim_t_is_longer=yes])])
+ if test x$zsh_cv_rlim_t_is_longer = xyes; then
+   AC_CACHE_CHECK(if rlim_t is a quad,
+   zsh_cv_rlim_t_is_quad_t,
+@@ -1880,13 +1877,12 @@ if test x$zsh_cv_rlim_t_is_longer = xyes; then
+ #endif
+ #include <stdio.h>
+ #include <sys/resource.h>
+-#include <stdlib.h>
+-main() { 
++int main() {
+   struct rlimit r;
+   char buf[20];
+   r.rlim_cur = 0;
+   sprintf(buf, "%qd", r.rlim_cur);
+-  exit(strcmp(buf, "0"));
++  return(strcmp(buf, "0"));
+ }]])],[zsh_cv_rlim_t_is_quad_t=yes],[zsh_cv_rlim_t_is_quad_t=no],[zsh_cv_rlim_t_is_quad_t=no])])
+   if test x$zsh_cv_rlim_t_is_quad_t = xyes; then
+     AC_DEFINE(RLIM_T_IS_QUAD_T)
+@@ -1903,8 +1899,7 @@ else
+ #include <sys/time.h>
+ #endif
+ #include <sys/resource.h>
+-#include <stdlib.h>
+-  main(){struct rlimit r;r.rlim_cur=-1;exit(r.rlim_cur<0);}]])],[zsh_cv_type_rlim_t_is_unsigned=yes],[zsh_cv_type_rlim_t_is_unsigned=no],[zsh_cv_type_rlim_t_is_unsigned=no])])
++  int main(){struct rlimit r;r.rlim_cur=-1;return(r.rlim_cur<0);}]])],[zsh_cv_type_rlim_t_is_unsigned=yes],[zsh_cv_type_rlim_t_is_unsigned=no],[zsh_cv_type_rlim_t_is_unsigned=no])])
+   if test x$zsh_cv_type_rlim_t_is_unsigned = xyes; then
+     AC_DEFINE(RLIM_T_IS_UNSIGNED)
+     DEFAULT_RLIM_T="unsigned $DEFAULT_RLIM_T"
+@@ -2187,9 +2182,8 @@ zsh_cv_sys_fifo,
+ #include <fcntl.h>
+ #include <signal.h>
+ #include <unistd.h>
+-#include <stdlib.h>
+ #include <sys/stat.h>
+-main()
++int main()
+ {
+     char c;
+     int fd;
+@@ -2200,18 +2194,18 @@ main()
+ #else
+     if(mknod("/tmp/fifo$$", 0010600, 0) < 0)
+ #endif
+-	exit(1);
++	return(1);
+     pid = fork();
+     if(pid < 0)
+-	exit(1);
++	return(1);
+     if(pid) {
+ 	fd = open("/tmp/fifo$$", O_RDONLY);
+-	exit(fd < 0 || read(fd, &c, 1) != 1 || c != 'x');
++	return(fd < 0 || read(fd, &c, 1) != 1 || c != 'x');
+     }
+     fd = open("/tmp/fifo$$", O_WRONLY);
+     ret = (fd < 0 || write(fd, "x", 1) < 1);
+     unlink("/tmp/fifo$$");
+-    exit(ret);
++    return(ret);
+ }
+ ]])],[zsh_cv_sys_fifo=yes],[zsh_cv_sys_fifo=no],[zsh_cv_sys_fifo=yes])
+ ])
+@@ -2289,8 +2283,7 @@ zsh_cv_sys_link,
+ [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <unistd.h>
+ #include <fcntl.h>
+-#include <stdlib.h>
+-main()
++int main()
+ {
+     int ret;
+     char *tmpfile, *newfile;
+@@ -2299,11 +2292,11 @@ main()
+     unlink(tmpfile);
+     unlink(newfile);
+     if(creat(tmpfile, 0644) < 0)
+-	exit(1);
++	return(1);
+     ret = link(tmpfile, newfile);
+     unlink(tmpfile);
+     unlink(newfile);
+-    exit(ret<0);
++    return(ret<0);
+ }
+ ]])],[zsh_cv_sys_link=yes],[zsh_cv_sys_link=no],[zsh_cv_sys_link=yes])])
+ AH_TEMPLATE([HAVE_LINK],
+@@ -2322,12 +2315,11 @@ zsh_cv_sys_killesrch,
+ #include <unistd.h>
+ #include <signal.h>
+ #include <errno.h>
+-#include <stdlib.h>
+-main()
++int main()
+ {
+     int pid = (getpid() + 10000) & 0xffffff;
+     while (pid && (kill(pid, 0) == 0 || errno != ESRCH)) pid >>= 1;
+-    exit(errno!=ESRCH);
++    return(errno!=ESRCH);
+ }
+ ]])],[zsh_cv_sys_killesrch=yes],[zsh_cv_sys_killesrch=no],[zsh_cv_sys_killesrch=yes])])
+ AH_TEMPLATE([BROKEN_KILL_ESRCH],
+@@ -2348,12 +2340,11 @@ if test x$signals_style = xPOSIX_SIGNALS; then
+     [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <signal.h>
+ #include <unistd.h>
+-#include <stdlib.h>
+ int child=0;
+ void handler(sig)
+     int sig;
+ {if(sig==SIGCHLD) child=1;}
+-main() {
++int main() {
+     struct sigaction act;
+     sigset_t set;
+     int pid, ret;
+@@ -2368,7 +2359,7 @@ main() {
+     if(pid>0) {
+     sigemptyset(&set);
+         ret=sigsuspend(&set);
+-        exit(child==0);
++        return(child==0);
+     }
+ }
+ ]])],[zsh_cv_sys_sigsuspend=yes],[zsh_cv_sys_sigsuspend=no],[zsh_cv_sys_sigsuspend=yes])])
+@@ -2400,15 +2391,14 @@ case "x$zsh_working_tcsetpgrp" in
+ #include <sys/types.h>
+ #include <unistd.h>
+ #include <fcntl.h>
+-#include <stdlib.h>
+-main() {
++int main() {
+     int fd;
+     int ret;
+     fd=open("/dev/tty", O_RDWR);
+-    if (fd < 0) exit(2);
++    if (fd < 0) return(2);
+     ret=tcsetpgrp(fd, tcgetpgrp(fd));
+-    if (ret < 0) exit(1);
+-    exit(0);
++    if (ret < 0) return(1);
++    return(0);
+ }
+ ]])],[zsh_cv_sys_tcsetpgrp=yes],[
+ case $? in
+@@ -2448,7 +2438,7 @@ if test x$ac_cv_func_getpwnam = xyes; then
+ #include <string.h>
+ #include <stdlib.h>
+ #include <unistd.h>
+-main() {
++int main() {
+     struct passwd *pw1, *pw2;
+     char buf[1024], name[1024];
+     sprintf(buf, "%d:%d", getpid(), rand());
+@@ -2456,7 +2446,7 @@ main() {
+     if (pw1) strcpy(name, pw1->pw_name);
+     sprintf(buf, "%d:%d", rand(), getpid());
+     pw2=getpwnam(buf);
+-    exit(pw1!=0 && pw2!=0 && !strcmp(name, pw2->pw_name));
++    return(pw1!=0 && pw2!=0 && !strcmp(name, pw2->pw_name));
+ }
+ ]])],[zsh_cv_sys_getpwnam_faked=no],[zsh_cv_sys_getpwnam_faked=yes],[zsh_cv_sys_getpwnam_faked=no])])
+     if test x$zsh_cv_sys_getpwnam_faked = xyes; then
+@@ -2775,20 +2765,17 @@ elif test "x$dynamic" = xyes; then
+    zsh_cv_sys_elf,
+    [AC_RUN_IFELSE([AC_LANG_SOURCE([[/* Test for whether ELF binaries are produced */
+ #include <fcntl.h>
+-#include <stdlib.h>
+ #include <unistd.h>
+-main(argc, argv)
+-int argc;
+-char *argv[];
++int main(int argc, char *argv[])
+ {
+ 	char b[4];
+ 	int i = open(argv[0],O_RDONLY);
+ 	if(i == -1) 
+-		exit(1); /* fail */
++		return(1); /* fail */
+ 	if(read(i,b,4)==4 && b[0]==127 && b[1]=='E' && b[2]=='L' && b[3]=='F')
+-		exit(0); /* succeed (yes, it's ELF) */
++		return(0); /* succeed (yes, it's ELF) */
+ 	else
+-		exit(1); /* fail */
++		return(1); /* fail */
+ }]])],[zsh_cv_sys_elf=yes],[zsh_cv_sys_elf=no],[zsh_cv_sys_elf=yes])])
+ 
+   # We use [0-9]* in case statements, so need to change quoting
+@@ -2924,13 +2911,12 @@ LDFLAGS="$old_LDFLAGS")
+   AC_CACHE_CHECK(if your dlsym() needs a leading underscore,
+    zsh_cv_func_dlsym_needs_underscore,
+    [echo failed >conftestval && cat >conftest.c <<EOM
+-fred () { }
++void fred () { }
+ EOM
+     AC_TRY_COMMAND($CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest.c 1>&AS_MESSAGE_LOG_FD) &&
+     AC_TRY_COMMAND($DLLD $LDFLAGS $DLLDFLAGS -o conftest.$DL_EXT conftest.o 1>&AS_MESSAGE_LOG_FD) &&
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <stdio.h>
+-#include <stdlib.h>
+ #ifdef HPUX10DYNAMIC
+ #include <dl.h>
+ #define RTLD_LAZY BIND_DEFERRED
+@@ -2957,16 +2943,16 @@ char *zsh_gl_sym_addr ;
+ 
+ extern int fred() ;
+ 
+-main()
++int main()
+ {
+     void * handle ;
+     void * symbol ;
+     FILE *f=fopen("conftestval", "w");
+-    if (!f) exit(1);
++    if (!f) return(1);
+     handle = dlopen("./conftest.$DL_EXT", RTLD_LAZY) ;
+     if (handle == NULL) {
+         fprintf (f, "dlopen failed") ;
+-            exit(1);
++            return(1);
+     }
+     symbol = dlsym(handle, "fred") ;
+     if (symbol == NULL) {
+@@ -2974,13 +2960,13 @@ main()
+         symbol = dlsym(handle, "_fred") ;
+         if (symbol == NULL) {
+             fprintf (f, "dlsym failed") ;
+-                exit(1);
++                return(1);
+                 }
+         fprintf (f, "yes") ;
+     }
+     else
+         fprintf (f, "no") ;
+-    exit(0);
++    return(0);
+ }]])],[zsh_cv_func_dlsym_needs_underscore=`cat conftestval`],[zsh_cv_func_dlsym_needs_underscore=failed
+     dynamic=no],[zsh_cv_func_dlsym_needs_underscore=no])])
+   if test "x$zsh_cv_func_dlsym_needs_underscore" = xyes; then
diff --git a/zsh.spec b/zsh.spec
index e6d591b..0b64e77 100644
--- a/zsh.spec
+++ b/zsh.spec
@@ -1,7 +1,7 @@
 Summary: Powerful interactive shell
 Name: zsh
 Version: 5.9
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: MIT
 URL: http://zsh.sourceforge.net/
 Source0: https://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.xz
@@ -15,6 +15,8 @@ Source7: dotzprofile
 
 # do not use egrep in tests to make them pass again
 Patch1: 0001-zsh-5.9-do-not-use-egrep-in-tests.patch
+# Upstream commit ab4d62eb975a4c4c51dd35822665050e2ddc6918
+Patch2: 0002-zsh-Use-int-main-in-test-c-codes.patch
 
 BuildRequires: autoconf
 BuildRequires: coreutils
@@ -163,6 +165,9 @@ fi
 %doc Doc/*.html
 
 %changelog
+* Fri Jan 13 2023 Timm Bäder <tbaeder@redhat.com> - 5.9-4
+- use 'int main()' in test C-codes in configure
+
 * Mon Jan 09 2023 Kamil Dudka <kdudka@redhat.com> - 5.9-3
 - do not use egrep in tests to make them pass again