configure: Add a check for the grp.h header.

configure

@@ -7434,6 +7434,7 @@ done
 
 
 
+
 
 
 for ac_header in \
@@ -7456,6 +7457,7 @@ for ac_header in \
 	float.h \
 	fontconfig/fontconfig.h \
 	getopt.h \
+	grp.h \
 	ieeefp.h \
 	io.h \
 	jack/jack.h \

configure.ac

@@ -258,6 +258,7 @@ AC_CHECK_HEADERS(\
 	float.h \
 	fontconfig/fontconfig.h \
 	getopt.h \
+	grp.h \
 	ieeefp.h \
 	io.h \
 	jack/jack.h \

dlls/shell32/shfldr_unixfs.c

@@ -141,7 +141,9 @@
 #ifdef HAVE_PWD_H
 # include <pwd.h>
 #endif
-#include <grp.h>
+#ifdef HAVE_GRP_H
+# include <grp.h>
+#endif
 
 #define COBJMACROS
 #define NONAMELESSUNION

include/config.h.in

@@ -234,6 +234,9 @@
 /* Define if we have libgphoto2 development environment */
 #undef HAVE_GPHOTO2
 
+/* Define to 1 if you have the <grp.h> header file. */
+#undef HAVE_GRP_H
+
 /* Define to 1 if you have the <hal/libhal.h> header file. */
 #undef HAVE_HAL_LIBHAL_H