Merge pull request #24 from penfold42/gcc7

GCC 7 support

Makefile.rules

@@ -29,7 +29,7 @@ $(error RASPPI must be one of: 0, 1, 2, 3)
 endif
 
 AFLAGS	 += $(ARCH)
-CFLAGS	 += $(ARCH) -Wall -Wno-psabi -fsigned-char -fno-builtin -Ofast -DNDEBUG
+CFLAGS	 += $(ARCH) -Wall -Wno-unused-variable -Wno-unused-but-set-variable -Wno-psabi -fsigned-char -fno-builtin -Ofast -DNDEBUG
 CPPFLAGS := $(CFLAGS) $(CPPFLAGS) -fno-exceptions -fno-rtti -std=c++0x -Wno-write-strings
 CFLAGS	 += -fno-delete-null-pointer-checks -fdata-sections -ffunction-sections -u _printf_float -std=gnu99
 

README.md

@@ -13,18 +13,25 @@ Commodore Plus4
 
 See www.pi1541.com for SD card and hardware configurations.
 
-Building
---------
+Toolchain Installation
+----------------------
 
 On Windows use GNU Tools ARM Embedded tool chain 5.4.1 using make.
 https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads/5-2016-q2-update
 
 On dpkg based linux systems install:
-binutils-arm-none-eabi
-gcc-arm-none-eabi
-libnewlib-arm-none-eabi
-libstdc++-arm-none-eabi-newlib
+(Tested on osmc/rpi3)
+```
+apt-get install binutils-arm-none-eabi gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib
+```
 
+On RHEL/Centos/Fedora systems follow the guide at:
+https://web1.foxhollow.ca/?menu=centos7arm
+(Tested on Centos7/x64 with GCC7)
+https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads/7-2017-q4-major
+
+Building
+--------
 ```
 make
 ```

src/FileBrowser.cpp

@@ -892,10 +892,11 @@ void FileBrowser::ShowDeviceAndROM()
 	char buffer[256];
 	u32 textColour = RGBA(0, 0, 0, 0xff);
 	u32 bgColour = RGBA(0xff, 0xff, 0xff, 0xff);
-	u32 y = screenMain->ScaleY(STATUS_BAR_POSITION_Y);
+	u32 x = 0; // 43 * 8
+	u32 y = screenMain->ScaleY(STATUS_BAR_POSITION_Y - 20);
 
-	snprintf(buffer, 256, "Device %d %s               \r\n", deviceID, roms->ROMNames[roms->currentROMIndex]);
-	screenMain->PrintText(false, 43 * 8, y, buffer, textColour, bgColour);
+	snprintf(buffer, 256, "Device %d %s\r\n", deviceID, roms->ROMNames[roms->currentROMIndex]);
+	screenMain->PrintText(false, x, y, buffer, textColour, bgColour);
 }
 
 void FileBrowser::DisplayDiskInfo(DiskImage* diskImage, const char* filenameForIcon)

src/armc-cstartup.c

@@ -56,7 +56,7 @@ void _cstartup( unsigned int r0, unsigned int r1, unsigned int r2 )
     while( bss < bss_end )
         *bss++ = 0;
 
-	__libc_init_array();
+    __libc_init_array();
 
     /* We should never return from main ... */
     kernel_main( r0, r1, r2 );

src/armc-cstubs.c

@@ -87,6 +87,17 @@ void _exit(int status)
   }
 }
 
+void _fini(int status)
+{
+  /* Stop the compiler complaining about unused variables by "using" it */
+  (void) status;
+
+  while (1)
+  {
+    /* TRAP HERE */
+  }
+}
+
 /* There's currently no implementation of a file system because there's no
  file system! */
 int _close(int file)

src/iec_bus.h

@@ -531,10 +531,10 @@ public:
 		invertIECInputs = value;
 		if (value)
 		{
-			PI_Atn = ~PI_Atn;
-			PI_Data = ~PI_Data;
-			PI_Clock = ~PI_Clock;
-			PI_Reset = ~PI_Reset;
+			PI_Atn = !PI_Atn;
+			PI_Data = !PI_Data;
+			PI_Clock = !PI_Clock;
+			PI_Reset = !PI_Reset;
 		}
 	}