made library, examples and Makefile MINGW64 friendly

_gnu-make/Makefile

@@ -17,6 +17,13 @@ ifeq ($(platform),)
     override platform := mac
     override architecture := $(__uname_m)
   endif
+  ifeq ($(findstring mingw,$(__uname_s)),mingw)
+    override platform := windows
+    override architecture := $(if $(findstring MINGW32,$(MSYSTEM)),i686,$(if $(findstring MINGW64,$(MSYSTEM)),x86_64,))
+    ifeq ($(CC),cc)
+      override CC := gcc
+    endif
+  endif
 endif
 ifeq ($(architecture),)
   override architecture := unknown-architecture
@@ -35,17 +42,22 @@ CXXFLAGS := -O2 -g -Wall -pedantic -Werror
 
 ifeq ($(platform),linux)
 override LDFLAGS := $(LDFLAGS) -ldl
-CFLAGS +=-D_XOPEN_SOURCE=500
+CFLAGS += -D_XOPEN_SOURCE=500 -fpic
+CXXFLAGS += -fpic
 endif
 ifeq ($(platform),mac)
-CFLAGS +=-D_DARWIN_C_SOURCE
+CFLAGS += -D_DARWIN_C_SOURCE
 endif
 
 ifeq ($(platform),mac)
 libsuffix := .dylib
-else
+endif
+ifeq ($(platform),linux)
 libsuffix := .so
 endif
+ifeq ($(platform),windows)
+libsuffix := .dll
+endif
 
 .PHONY: build-executable
 build: build-executable
@@ -53,12 +65,12 @@ build-executable: $(bindir)/executable $(bindir)/executable-cpp
 
 $(bindir)/executable: $(srcdir)/whereami.c $(srcdir)/whereami.h $(exampledir)/executable.c
 	mkdir -p $(@D)
-	$(CC) -o $@ -I $(srcdir) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -fpic $(filter-out %.h,$^)
+	$(CC) -o $@ -I $(srcdir) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(filter-out %.h,$^)
 	$(if $(postbuild),$(postbuild) $@)
 
 $(bindir)/executable-cpp: $(srcdir)/whereami.c $(srcdir)/whereami.h $(exampledir)/executable.c
 	mkdir -p $(@D)
-	$(CXX) -x c++ -o $@ -I $(srcdir) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) -fpic $(filter-out %.h,$^)
+	$(CXX) -x c++ -o $@ -I $(srcdir) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) $(filter-out %.h,$^)
 	$(if $(postbuild),$(postbuild) $@)
 
 .PHONY: build-library
@@ -67,12 +79,12 @@ build-library: $(bindir)/library$(libsuffix) $(bindir)/library-cpp$(libsuffix)
 
 $(bindir)/library$(libsuffix): $(srcdir)/whereami.c $(srcdir)/whereami.h $(exampledir)/library.c
 	mkdir -p $(@D)
-	$(CC) -shared -o $@ -I $(srcdir) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -fpic $(filter-out %.h,$^)
+	$(CC) -shared -o $@ -I $(srcdir) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(filter-out %.h,$^)
 	$(if $(postbuild),$(postbuild) $@)
 
 $(bindir)/library-cpp$(libsuffix): $(srcdir)/whereami.c $(srcdir)/whereami.h $(exampledir)/library.c
 	mkdir -p $(@D)
-	$(CXX) -x c++ -shared -o $@ -I $(srcdir) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) -fpic $(filter-out %.h,$^)
+	$(CXX) -x c++ -shared -o $@ -I $(srcdir) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) $(filter-out %.h,$^)
 	$(if $(postbuild),$(postbuild) $@)
 
 clean:

example/library.c

@@ -55,8 +55,8 @@ static void unload()
 #define WIN32_LEAN_AND_MEAN
 #if defined(_MSC_VER)
 #pragma warning(push, 3)
-#include <windows.h>
 #endif
+#include <windows.h>
 
 BOOL APIENTRY DllMain(HMODULE hModule, DWORD  ul_reason_for_call, LPVOID lpReserved)
 {

src/whereami.c

@@ -26,6 +26,24 @@ extern "C" {
 #define WAI_REALLOC(p, size) realloc(p, size)
 #endif
 
+#ifndef WAI_NOINLINE
+#if defined(_MSC_VER)
+#define WAI_NOINLINE __declspec(noinline)
+#elif defined(__GNUC__)
+#define WAI_NOINLINE __attribute__((noinline))
+#else
+#error unsupported compiler
+#endif
+#endif
+
+#if defined(_MSC_VER)
+#define WAI_RETURN_ADDRESS() _ReturnAddress()
+#elif defined(__GNUC__)
+#define WAI_RETURN_ADDRESS() __builtin_extract_return_addr(__builtin_return_address(0))
+#else
+#error unsupported compiler
+#endif
+
 #if defined(_WIN32)
 
 #define WIN32_LEAN_AND_MEAN
@@ -38,12 +56,6 @@ extern "C" {
 #pragma warning(pop)
 #endif
 
-#ifndef WAI_NOINLINE
-#ifdef _MSC_VER
-#define WAI_NOINLINE __declspec(noinline)
-#endif
-#endif
-
 static int WAI_PREFIX(getModulePath_)(HMODULE module, char* out, int capacity, int* dirname_length)
 {
   wchar_t buffer1[MAX_PATH];
@@ -124,7 +136,7 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
 #pragma warning(push)
 #pragma warning(disable: 4054)
 #endif
-  if (GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (LPCTSTR)_ReturnAddress(), &module))
+  if (GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (LPCTSTR)WAI_RETURN_ADDRESS(), &module))
 #if defined(_MSC_VER)
 #pragma warning(pop)
 #endif
@@ -150,12 +162,6 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
 #define WAI_PROC_SELF_EXE "/proc/self/exe"
 #endif
 
-#ifndef WAI_NOINLINE
-#ifdef __GNUC__
-#define WAI_NOINLINE __attribute__((noinline))
-#endif
-#endif
-
 WAI_FUNCSPEC
 int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
 {
@@ -237,7 +243,7 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
 
       if (sscanf(buffer, "%" PRIx64 "-%" PRIx64 " %s %" PRIx64 " %x:%x %u %s\n", &low, &high, perms, &offset, &major, &minor, &inode, path) == 8)
       {
-        uint64_t addr = (uint64_t)(uintptr_t) __builtin_extract_return_addr(__builtin_return_address(0));
+        uint64_t addr = (uint64_t)(uintptr_t)WAI_RETURN_ADDRESS();
         if (low <= addr && addr <= high)
         {
           char* resolved;
@@ -326,12 +332,6 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
 #include <string.h>
 #include <dlfcn.h>
 
-#ifndef WAI_NOINLINE
-#ifdef __GNUC__
-#define WAI_NOINLINE __attribute__((noinline))
-#endif
-#endif
-
 WAI_FUNCSPEC
 int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
 {
@@ -396,7 +396,7 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
   {
     Dl_info info;
 
-    if (dladdr(__builtin_extract_return_addr(__builtin_return_address(0)), &info))
+    if (dladdr(WAI_RETURN_ADDRESS(), &info))
     {
       resolved = realpath(info.dli_fname, buffer);
       if (!resolved)
@@ -437,12 +437,6 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
 #include <string.h>
 #include <dlfcn.h>
 
-#ifndef WAI_NOINLINE
-#ifdef __GNUC__
-#define WAI_NOINLINE __attribute__((noinline))
-#endif
-#endif
-
 #if !defined(WAI_PROC_SELF_EXE)
 #define WAI_PROC_SELF_EXE "/proc/self/exefile"
 #endif
@@ -508,7 +502,7 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
   {
     Dl_info info;
 
-    if (dladdr(__builtin_extract_return_addr(__builtin_return_address(0)), &info))
+    if (dladdr(WAI_RETURN_ADDRESS(), &info))
     {
       resolved = realpath(info.dli_fname, buffer);
       if (!resolved)