allow win32 to build shared lib

Author: wolfv

src/CMakeLists.txt

@@ -51,6 +51,7 @@ IF (DISABLE_SHARED)
 ADD_LIBRARY (libsolv STATIC ${libsolv_SRCS})
 ELSE (DISABLE_SHARED)
 ADD_LIBRARY (libsolv SHARED ${libsolv_SRCS})
+TARGET_COMPILE_DEFINITIONS(libsolv PRIVATE SOLV_EXPORTS)
 ENDIF (DISABLE_SHARED)
 
 SET_TARGET_PROPERTIES(libsolv PROPERTIES OUTPUT_NAME "solv")

win32/config.h

@@ -0,0 +1,13 @@
+#ifdef _WIN32
+    #ifdef SOLV_STATIC_LIB
+        #define SOLV_API
+    #else
+        #ifdef SOLV_EXPORTS
+            #define SOLV_API __declspec(dllexport)
+        #else
+            #define SOLV_API __declspec(dllimport)
+        #endif
+    #endif
+#else
+    #define SOLV_API
+#endif

win32/getopt.c

@@ -5,8 +5,10 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-char *optarg;
-int optind=1, opterr=1, optopt, __optpos, __optreset=0;
+#include "config.h"
+
+SOLV_API char *optarg;
+SOLV_API int optind=1, opterr=1, optopt, __optpos, __optreset=0;
 
 #define optpos __optpos
 

win32/getopt.h

@@ -5,9 +5,12 @@
 extern "C" {
 #endif
 
+#include "config.h"
+
 int getopt(int, char * const [], const char *);
-extern char *optarg;
-extern int optind, opterr, optopt, optreset;
+
+SOLV_API extern char *optarg;
+SOLV_API extern int optind, opterr, optopt, optreset;
 
 struct option {
 	const char *name;