Make it easier to compiler on IRIX (#997)

Thanks ]joshyfishy22 for testing on an actual machine running IRIX

src/Core.h

@@ -185,6 +185,7 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_POSIX
 #define CC_BUILD_GL
 #define CC_BUILD_X11
+#define CC_BUILD_XINPUT2
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
 #if defined CC_BUILD_RPI
@@ -218,6 +219,7 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_POSIX
 #define CC_BUILD_GL
 #define CC_BUILD_X11
+#define CC_BUILD_XINPUT2
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
 #elif defined __FreeBSD__ || defined __DragonFly__
@@ -226,6 +228,7 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_BSD
 #define CC_BUILD_GL
 #define CC_BUILD_X11
+#define CC_BUILD_XINPUT2
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
 #elif defined __OpenBSD__
@@ -234,6 +237,7 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_BSD
 #define CC_BUILD_GL
 #define CC_BUILD_X11
+#define CC_BUILD_XINPUT2
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
 #elif defined __NetBSD__
@@ -242,6 +246,7 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_BSD
 #define CC_BUILD_GL
 #define CC_BUILD_X11
+#define CC_BUILD_XINPUT2
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
 #elif defined __HAIKU__
@@ -250,6 +255,14 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_GL
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
+#elif defined __sgi
+#define CC_BUILD_IRIX
+#define CC_BUILD_POSIX
+#define CC_BUILD_GL
+#define CC_BUILD_X11
+#define CC_BUILD_CURL
+#define CC_BUILD_OPENAL
+#define CC_BIG_ENDIAN
 #elif defined __EMSCRIPTEN__
 #define CC_BUILD_WEB
 #define CC_BUILD_GL

src/Logger.c

@@ -236,6 +236,12 @@ static void DumpFrame(cc_string* trace, void* addr) {
 }
 #elif defined CC_BUILD_PSP
 /* No backtrace support implemented for PSP */
+#elif defined CC_BUILD_IRIX
+/* IRIX doesn't expose a nice interface for dladdr */
+static void DumpFrame(cc_string* trace, void* addr) {
+	cc_uintptr addr_ = (cc_uintptr)addr;
+	String_Format1(trace, "%x", &addr_);
+}
 #elif defined CC_BUILD_POSIX
 /* need to define __USE_GNU for dladdr */
 #ifndef __USE_GNU
@@ -360,6 +366,11 @@ void Logger_Backtrace(cc_string* trace, void* ctx) {
 	String_AppendConst(trace, "-- backtrace unimplemented --");
 	/* Backtrace not implemented for PSP */
 }
+#elif defined CC_BUILD_IRIX
+void Logger_Backtrace(cc_string* trace, void* ctx) {
+	String_AppendConst(trace, "-- backtrace unimplemented --");
+	/* TODO implement backtrace using exc_unwind https://nixdoc.net/man-pages/IRIX/man3/exception.3.html */
+}
 #elif defined CC_BUILD_POSIX
 #include <execinfo.h>
 void Logger_Backtrace(cc_string* trace, void* ctx) {
@@ -790,6 +801,18 @@ static void PrintRegisters(cc_string* str, void* ctx) {
 	#error "Unknown CPU architecture"
 #endif
 }
+#elif defined CC_BUILD_IRIX
+/* See /usr/include/sys/ucontext.h */
+/* https://nixdoc.net/man-pages/IRIX/man5/UCONTEXT.5.html */
+static void PrintRegisters(cc_string* str, void* ctx) {
+	mcontext_t* r = &((ucontext_t*)ctx)->uc_mcontext;
+
+	#define REG_GNUM(num) &r->__gregs[CTX_EPC]
+	#define REG_GET_PC()  &r->__gregs[CTX_MDLO]
+	#define REG_GET_LO()  &r->__gregs[CTX_MDLO]
+	#define REG_GET_HI()  &r->__gregs[CTX_MDHI]
+	Dump_MIPS()
+}
 #elif defined CC_BUILD_PSP
 static void PrintRegisters(cc_string* str, void* ctx) {
 	/* Register dumping not implemented */

src/Makefile

@@ -94,6 +94,11 @@ ifeq ($(PLAT),serenityos)
 LIBS=-lgl -lSDL2
 endif
 
+ifeq ($(PLAT),irix)
+CC=gcc
+LIBS=-lGL -lX11 -lXi -lm -lpthread -ldl
+endif
+
 ifeq ($(PLAT),psp)
 CC=psp-gcc
 LIBS=-lm -lpspgum -lpspgu -lpspge -lpspdisplay
@@ -129,6 +134,8 @@ haiku:
 	$(MAKE) $(ENAME) PLAT=haiku
 serenityos:
 	$(MAKE) $(ENAME) PLAT=serenityos
+irix:
+	$(MAKE) $(ENAME) PLAT=irix
 psp:
 	$(MAKE) ClassiCube.elf PLAT=psp
 

src/Platform_Posix.c

@@ -140,8 +140,12 @@ cc_uint64 Stopwatch_Measure(void) { return gethrtime(); }
 #else
 cc_uint64 Stopwatch_Measure(void) {
 	struct timespec t;
+	#ifdef CC_BUILD_IRIX
+	clock_gettime(CLOCK_REALTIME, &t);
+	#else
 	/* TODO: CLOCK_MONOTONIC_RAW ?? */
 	clock_gettime(CLOCK_MONOTONIC, &t);
+	#endif
 	return (cc_uint64)t.tv_sec * NS_PER_SEC + t.tv_nsec;
 }
 #endif
@@ -202,7 +206,7 @@ cc_result Directory_Enum(const cc_string* dirPath, void* obj, Directory_EnumCall
 		len = String_Length(src);
 		String_AppendUtf8(&path, src, len);
 
-#if defined CC_BUILD_HAIKU || defined CC_BUILD_SOLARIS
+#if defined CC_BUILD_HAIKU || defined CC_BUILD_SOLARIS || defined CC_BUILD_IRIX
 		{
 			char full_path[NATIVE_STR_LEN];
 			struct stat sb;
@@ -801,6 +805,16 @@ static cc_result Process_RawGetExePath(char* path, int* len) {
 	Mem_Copy(path, info.name, *len);
 	return 0;
 }
+#elif defined CC_BUILD_IRIX
+static cc_result Process_RawGetExePath(char* path, int* len) {
+	static cc_string file = String_FromConst("ClassiCube");
+
+	/* TODO properly get exe path */
+	/* Maybe use PIOCOPENM from https://nixdoc.net/man-pages/IRIX/man4/proc.4.html */
+	Mem_Copy(path, file.buffer, file.length);
+	*len = file.length;
+	return 0;
+}
 #endif
 
 
@@ -1008,6 +1022,15 @@ static void Platform_InitPosix(void) {
 }
 void Platform_Free(void) { }
 
+#ifdef CC_BUILD_IRIX
+cc_bool Platform_DescribeError(cc_result res, cc_string* dst) {
+	const char* err = strerror(res);
+	if (!err || res >= 1000) return false;
+
+	String_AppendUtf8(dst, err, String_Length(err));
+	return true;
+}
+#else
 cc_bool Platform_DescribeError(cc_result res, cc_string* dst) {
 	char chars[NATIVE_STR_LEN];
 	int len;
@@ -1024,6 +1047,7 @@ cc_bool Platform_DescribeError(cc_result res, cc_string* dst) {
 	String_AppendUtf8(dst, chars, len);
 	return true;
 }
+#endif
 
 #if defined CC_BUILD_DARWIN
 static void Platform_InitStopwatch(void) {

src/Window_X11.c

@@ -10,7 +10,9 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <X11/XKBlib.h>
+#ifdef CC_BUILD_XINPUT2
 #include <X11/extensions/XInput2.h>
+#endif
 #include <stdio.h>
 
 #ifdef X_HAVE_UTF8_STRING
@@ -1129,6 +1131,7 @@ void Window_CloseKeyboard(void) { }
 static cc_bool rawMouseInited, rawMouseSupported;
 static int xiOpcode;
 
+#ifdef CC_BUILD_XINPUT2
 static void CheckMovementDelta(double dx, double dy) {
 	/* Despite the assumption that XI_RawMotion is relative,     */
 	/*  unfortunately there's a few buggy corner cases out there */
@@ -1210,6 +1213,10 @@ static void InitRawMouse(void) {
 	XISelectEvents(win_display, win_rootWin, &evmask, 1);
 	rawMouseSupported = true;
 }
+#else
+static void HandleGenericEvent(XEvent* e) { }
+static void InitRawMouse(void) { }
+#endif
 
 void Window_EnableRawMouse(void) {
 	DefaultEnableRawMouse();