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Objective-C on the MinPSPW SDK

 
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Heimdall



Joined: 10 Nov 2005
Posts: 259
Location: Netherlands
PostPosted: Thu Sep 25, 2008 10:26 pm    Post subject: Objective-C on the MinPSPW SDK Reply with quote
As of build 0.8.8 there is a new compiler included and a sample obj-c project.

https://sourceforge.net/project/showfiles.php?group_id=223830&package_id=270611&release_id=628720

The example code:


Code:
#include <objc/Object.h>

@interface Greeter:Object
{
 /* This is left empty on purpose:
  ** Normally instance variables would be declared here,
  ** but these are not used in our example.
  */
}

- (void)greet;

@end


#include <pspkernel.h>
#include <pspdebug.h>
#include <pspctrl.h>

/* Define printf, just to make typing easier */
#define printf  pspDebugScreenPrintf

@implementation Greeter

- (void)greet
{
   printf("Hello, World from Obj-C!\n");
}

@end

/* Define the module info section */
PSP_MODULE_INFO("template", 0, 1, 1);

/* Define the main thread's attribute value (optional) */
PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER | THREAD_ATTR_VFPU);

int main(void)
{
   id myGreeter;
   myGreeter=[Greeter new];

   [myGreeter greet];

   [myGreeter free];

   /* Non Objective-C code to allow the app to end */
   SceCtrlData pad;
   
   printf("\nPress X to quit.\n");
   for (;;)
   {
      sceCtrlReadBufferPositive(&pad, 1);
      if (pad.Buttons & PSP_CTRL_CROSS)
         break;
      sceDisplayWaitVblankStart();
   }
   sceKernelExitGame();
   
   return 0;
}


So for the iPhone fans there is no excuse to drop it and make cool apps for the PSP :)
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J.F.



Joined: 22 Feb 2004
Posts: 2906
PostPosted: Fri Sep 26, 2008 4:13 am    Post subject: Reply with quote
Cool! Maybe the toolchain script can be altered to compile obj-c as well.
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Heimdall



Joined: 10 Nov 2005
Posts: 259
Location: Netherlands
PostPosted: Fri Sep 26, 2008 5:14 pm    Post subject: Reply with quote
I never built the official script but i think the patch is easy, on the download part, it is necessary to download the gcc objc component and on the build script enable it by:

Code:
--enable-languages="c,c++,objc"


This builds but it won't link, I had to change my script with something like:

CFLAGS="-G0" \
../../gcc-4.3.2/configure \
--enable-languages="c,c++,objc" \
... and all the other flags...

Then I added the sample code to the SDK:


Code:
Index: pspsdk/src/base/build.mak
===================================================================
--- pspsdk/src/base/build.mak   (revision 2432)
+++ pspsdk/src/base/build.mak   (working copy)
@@ -45,6 +45,11 @@
 CFLAGS += -D_PSP_FW_VERSION=$(PSP_FW_VERSION)
 CXXFLAGS += -D_PSP_FW_VERSION=$(PSP_FW_VERSION)
 
+# Objective-C selection. All Objective C code must be linked against libobjc.a
+ifeq ($(USE_OBJC),1)
+LIBS     := $(LIBS) -lobjc
+endif
+
 ifeq ($(BUILD_PRX),1)
 LDFLAGS  := $(addprefix -L,$(LIBDIR)) -specs=$(PSPSDK)/lib/prxspecs -Wl,-q,-T$(PSPSDK)/lib/linkfile.prx $(LDFLAGS)
 EXTRA_CLEAN += $(TARGET).elf
@@ -198,6 +203,9 @@
 %.c: %.exp
    psp-build-exports -b $< > $@
 
+%.o: %.m
+   $(CC) $(CFLAGS) -c -o $@ $<
+
 clean:
    -rm -f $(FINAL_TARGET) $(EXTRA_CLEAN) $(OBJS) $(PSP_EBOOT_SFO) $(PSP_EBOOT) $(EXTRA_TARGETS)
 
Index: pspsdk/src/base/build_prx.mak
===================================================================
--- pspsdk/src/base/build_prx.mak   (revision 2432)
+++ pspsdk/src/base/build_prx.mak   (working copy)
@@ -37,6 +37,11 @@
 
 CFLAGS += -D_PSP_FW_VERSION=$(PSP_FW_VERSION)
 
+# Objective-C selection. All Objective C code must be linked against libobjc.a
+ifeq ($(USE_OBJC),1)
+LIBS     := $(LIBS) -lobjc
+endif
+
 # Library selection.  By default we link with Newlib's libc.  Allow the
 # user to link with PSPSDK's libc if USE_PSPSDK_LIBC is set to 1.
 
@@ -80,6 +85,9 @@
 %.c: %.exp
    psp-build-exports -b $< > $@
 
+%.o: %.m
+   $(CC) $(CFLAGS) -c -o $@ $<
+
 clean: $(EXTRA_CLEAN)
    -rm -f $(FINAL_TARGET) $(TARGET).elf $(OBJS)
 
Index: pspsdk/src/samples/Makefile.am
===================================================================
--- pspsdk/src/samples/Makefile.am   (revision 2432)
+++ pspsdk/src/samples/Makefile.am   (working copy)
@@ -81,7 +81,8 @@
    utility/systemparam \
    utility/osk \
    me/basic \
-   wlan
+   wlan \
+   obj-c
 
 all:
 
Index: pspsdk/src/samples/obj-c/main.m
===================================================================
--- pspsdk/src/samples/obj-c/main.m   (revision 0)
+++ pspsdk/src/samples/obj-c/main.m   (revision 0)
@@ -0,0 +1,61 @@
+#include <objc/Object.h>
+
+@interface Greeter:Object
+{
+ /* This is left empty on purpose:
+  ** Normally instance variables would be declared here,
+  ** but these are not used in our example.
+  */
+}
+
+- (void)greet;
+
+@end
+
+
+#include <pspkernel.h>
+#include <pspdebug.h>
+#include <pspctrl.h>
+
+/* Define printf, just to make typing easier */
+#define printf  pspDebugScreenPrintf
+
+@implementation Greeter
+
+- (void)greet
+{
+   printf("Hello, World from Obj-C!\n");
+}
+
+@end
+
+/* Define the module info section */
+PSP_MODULE_INFO("template", 0, 1, 1);
+
+/* Define the main thread's attribute value (optional) */
+PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER | THREAD_ATTR_VFPU);
+
+int main(void)
+{
+   id myGreeter;
+   myGreeter=[Greeter new];
+
+   [myGreeter greet];
+
+   [myGreeter free];
+
+   /* Non Objective-C code to allow the app to end */
+   SceCtrlData pad;
+   
+   printf("\nPress X to quit.\n");
+   for (;;)
+   {
+      sceCtrlReadBufferPositive(&pad, 1);
+      if (pad.Buttons & PSP_CTRL_CROSS)
+         break;
+      sceDisplayWaitVblankStart();
+   }
+   sceKernelExitGame();
+   
+   return 0;
+}
Index: pspsdk/src/samples/obj-c/Makefile.sample
===================================================================
--- pspsdk/src/samples/obj-c/Makefile.sample   (revision 0)
+++ pspsdk/src/samples/obj-c/Makefile.sample   (revision 0)
@@ -0,0 +1,19 @@
+TARGET = ObjC
+OBJS = main.o
+
+USE_OBJC=1
+
+INCDIR =
+CFLAGS = -G0 -Wall -O2
+CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
+ASFLAGS = $(CFLAGS)
+
+LIBDIR =
+LDFLAGS =
+
+EXTRA_TARGETS = EBOOT.PBP
+PSP_EBOOT_TITLE = ObjC Sample
+
+PSPSDK=$(shell psp-config --pspsdk-path)
+include $(PSPSDK)/lib/build.mak
+

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Heimdall



Joined: 10 Nov 2005
Posts: 259
Location: Netherlands
PostPosted: Wed Oct 01, 2008 12:35 am    Post subject: Reply with quote
I'm working on a patch to enable also Objective-C++. The compiler seems to work, i'm running tests and will generate a binary build in the coming days.
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