[PATCH 0/1] MR3984: msv1_0: Fix 'environ' undefined reference link error on FreeBSD.

[Brendan Shanks (＠bshanks)]

On FreeBSD, using `environ` in a shared library linked with `-Wl,-z,defs` causes an undefined reference error:
```
gcc -m64 -o dlls/msv1_0/msv1_0.so -shared -Wl,-Bsymbolic -Wl,-soname,msv1_0.so -Wl,-z,defs dlls/msv1_0/unixlib.o  dlls/ntdll/ntdll.so 
/usr/local/bin/ld: dlls/msv1_0/unixlib.o: in function `ntlm_fork':
/usr/home/pip/wine/build64/../dlls/msv1_0/unixlib.c:206: undefined reference to `environ'
collect2: error: ld returned 1 exit status
*** Error code 1
```

This is unfortunately a common issue on FreeBSD, see:
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263265
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265008
- https://reviews.freebsd.org/D30842

Reported by Gerald Pfeifer.

[PATCH 1/1] msv1_0: Fix 'environ' undefined reference link error on FreeBSD.

[Brendan Shanks]

From: Brendan Shanks

Reported by Gerald Pfeifer.
---
 dlls/msv1_0/unixlib.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/dlls/msv1_0/unixlib.c b/dlls/msv1_0/unixlib.c
index b51dde2ef0a..3003c9c6e54 100644
--- a/dlls/msv1_0/unixlib.c
+++ b/dlls/msv1_0/unixlib.c
@@ -40,7 +40,11 @@
 #include "wine/debug.h"
 #include "unixlib.h"

+#ifdef __FreeBSD__
+#include <dlfcn.h>
+#else
 extern char **environ;
+#endif

WINE_DEFAULT_DEBUG_CHANNEL(ntlm);
 WINE_DECLARE_DEBUG_CHANNEL(winediag);
@@ -160,6 +164,11 @@ static NTSTATUS ntlm_fork( void *args )
     struct ntlm_ctx *ctx = params->ctx;
     posix_spawn_file_actions_t file_actions;
     int pipe_in[2], pipe_out[2];
+#ifdef __FreeBSD__
+    char ***envp = dlsym( RTLD_DEFAULT, "environ" );
+#else
+    char ***envp = &environ;
+#endif

#ifdef HAVE_PIPE2
     if (pipe2( pipe_in, O_CLOEXEC ) < 0)
@@ -193,7 +202,7 @@ static NTSTATUS ntlm_fork( void *args )
     posix_spawn_file_actions_addclose( &file_actions, pipe_in[0] );
     posix_spawn_file_actions_addclose( &file_actions, pipe_in[1] );

-    if (posix_spawnp( &ctx->pid, params->argv[0], &file_actions, NULL, params->argv, environ ))
+    if (posix_spawnp( &ctx->pid, params->argv[0], &file_actions, NULL, params->argv, *envp ))
     {
         ctx->pid = -1;
         write( pipe_in[1], "BH\n", 3 );

[Alexandre Julliard (＠julliard)]

We should probably have a configure check and avoid `-Wl,-z,defs` instead.

[Gerald Pfeifer (＠gerald)]

Happy to confirm the patch fixes the build on my FreeBSD 12.4-STABLE/amd64 tester.

(A configure check avoiding #ifdef FreeBSD would be nice, of course.)