working toochain build script

.gitignore

@@ -3,3 +3,5 @@
 *.swo
 initrd.img
 main.elf
+arm-stmos/gcc-8.2.0
+arm-stmos/binutils-2.31.1

arm-stmos/README.md

@@ -0,0 +1,28 @@
+# The arm-stmos toolchain
+
+A special binutils/gcc toolchain is necessary to build stmos and associated
+programs. For convenience, a bash script has been written to attempt to automate
+the majority of the compilation/installation process. This process is based of
+off various tutorials from [osdev.org](wiki.osdev.org). 
+  
+Some programs are required for the build process. A list can be found [here]
+(https://wiki.osdev.org/GCC_Cross-Compiler#Installing_Dependencies). Once
+installed, just run the script:  
+```
+./create-toolchain.sh
+```  
+It should be safe to re-run the script, if necessary.  
+  
+After successful installation, be sure to add the toolchain to your path ($HOME
+/arm-stmos/bin). Then, follow these steps to build pdclib and the crt0: 
+* Cd to src/pdclib
+* Make sure the Makefile does not have the ```-g``` flag set under CFLAGS
+* Build pdclib (make)
+* Copy pdclib.a to ~/arm-stmos/lib/gcc/arm-stmos/8.2.0/libc.a
+* Add the ```-g``` flag to CFLAGS in the Makefile; Rebuild pdclib
+* Copy pdclib.a to ~/arm-stmos/lib/gcc/arm-stmos/8.2.0/libg.a
+* Cd to the stmos root directory; run ```make crt```
+* Copy crt0.o ~/arm-stmos/lib/gcc/arm-stmos/8.2.0/crt0.o
+  
+Now everything should be ready. Build stmos, run it, hope it works.
+

arm-stmos/create-toolchain.sh

@@ -13,47 +13,83 @@
 # libmpfr-dev
 
 # Get sources
-wget https://ftp.gnu.org/gnu/binutils/binutils-2.31.1.tar.xz
-wget https://ftp.gnu.org/gnu/gcc/gcc-8.2.0/gcc-8.2.0.tar.xz
-tar xfv ./binutils-2.31.1.tar.xz
-tar xfv ./gcc-8.2.0.tar.xz
+if [ ! -d ./binutils-2.31.1 ]; then
+	wget https://ftp.gnu.org/gnu/binutils/binutils-2.31.1.tar.xz
+	tar xf ./binutils-2.31.1.tar.xz
+	rm ./binutils-2.31.1.tar.xz
+
+	# Apply binutils changes
+	for file in $(find ./binutils-files -name '*.*'); do
+		cp -v $file $(echo $file | sed s/binutils-files/binutils-2.31.1/)
+	done
+fi
+if [ ! -d ./gcc-8.2.0 ]; then
+	wget https://ftp.gnu.org/gnu/gcc/gcc-8.2.0/gcc-8.2.0.tar.xz
+	tar xf ./gcc-8.2.0.tar.xz
+	rm ./gcc-8.2.0.tar.xz
+
+	# Apply gcc changes
+	for file in $(find ./gcc-files -name '*.*'); do
+		cp -v $file $(echo $file | sed s/gcc-files/gcc-8.2.0/)
+	done
+fi
 
-# Apply binutils changes
-for file in $(find ./binutils-files -name '*.*'); do
-	cp -v $file $(echo $file | sed s/binutils-files/binutils-2.31.1/)
-done
 
-# Apply gcc changes
-for file in $(find ./gcc-files -name '*.*'); do
-	cp -v $file $(echo $file | sed s/gcc-files/gcc-8.2.0/)
-done
 
 # Prepare
 export TARGET=arm-stmos
-mkdir -p $HOME/$TARGET
-export PATH="$HOME/$TARGET/bin:$PATH"
+export PREFIX=$HOME/$TARGET
+mkdir -p $PREFIX
+export PATH="$PREFIX/bin:$PATH"
 
 # Build binutils
-cd ./binutils-2.31.1/ld
-automake
-
-mkdir ../build
-cd ../build
-echo "Configure binutils... (../configure)"
-bash
-echo "Building binutils..."
-make -j8
-make install
+if ! [ -x "$(command -v $TARGET-as)" ]; then
+	echo "Starting binutils..."
+	cd ./binutils-2.31.1/ld
+	aclocal
+	automake
+	
+	mkdir ../build
+	cd ../build
+	echo "Configuring binutils..."
+	../configure --prefix=$PREFIX --target=$TARGET --with-sysroot --disable-nls
+	echo "Building binutils..."
+	make -j8
+	make install
+	
+	echo "Binutils installed. Test if it works? (Ctrl+D to continue with gcc)"
+	bash
+else
+	echo "Binutils found, skipping..."
+	cd binutils-2.31.1/build
+fi
 
 # Build gcc
-cd ../../gcc-8.2.0/libstdc++-v3/
-autoconf
-
-mkdir ../build
-cd ../build
-echo "Configure gcc... (../configure)"
-bash
-echo "Building gcc..."
-make -j8
-make install
+if ! [ -x "$(command -v $TARGET-gcc)" ]; then
+	if [ ! -d "$PREFIX/usr/include" ]; then
+		# Control will enter here if $DIRECTORY doesn't exist.
+		echo "Installing pdclib includes..."
+		mkdir -p $PREFIX/usr/include
+		cp -Rv ../../../src/pdclib/include/* $PREFIX/usr/include
+		cp -Rv ../../../src/pdclib/platform/stmos/include/* \
+			$PREFIX/usr/include
+	fi
+
+	cd ../../gcc-8.2.0/libstdc++-v3/
+	autoreconf
+	autoconf
+	
+	mkdir ../build
+	cd ../build
+	echo "Configuring gcc..."
+	../configure --prefix=$PREFIX --target=$TARGET --with-sysroot=$PREFIX \
+		--disable-nls --enable-languages=c,c++
+	echo "Building gcc..."
+	make all-gcc all-target-libgcc -j8
+	make install-gcc install-target-libgcc -j8
+else
+	echo "gcc found, skipping..."
+fi
+
+echo "All done :) enjoy"
 

src/pdclib/Makefile

@@ -27,7 +27,7 @@ ALLFILES := $(SRCFILES) $(HDRFILES) $(AUXFILES)
 CC = arm-stmos-gcc -mcpu=cortex-m4 -mthumb -fsigned-char
 
 WARNINGS := -Wall -Wextra -pedantic -Wno-unused-parameter -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs -Winline -Wno-long-long -Wuninitialized -Wstrict-prototypes -Wdeclaration-after-statement
-CFLAGS := -fPIC -Os -ffreestanding -std=c99 -I./testing -I./platform/stmos/include $(WARNINGS) $(USERFLAGS)
+CFLAGS := -fPIC -Os -g -ffreestanding -std=c99 -I./testing -I./platform/stmos/include $(WARNINGS) $(USERFLAGS)
 
 .PHONY: all clean srcdist tests testdrivers regtests regtestdrivers todos fixmes help
 

src/pdclib/include/pdclib/_PDCLIB_int.h

@@ -12,7 +12,7 @@
 /* would be considered a bug / missing feature: notify the author(s).         */
 /* -------------------------------------------------------------------------- */
 
-#include <stdbool.h>
+//#include <stdbool.h>
 
 #include "pdclib/_PDCLIB_config.h"
 #include "pdclib/_PDCLIB_aux.h"

src/pdclib/platform/stmos/include/pdclib/_PDCLIB_config.h

@@ -143,7 +143,7 @@ struct _PDCLIB_lldiv_t
 #define _PDCLIB_SIG_ATOMIC INT
 
 /* Result type of the 'sizeof' operator (must be unsigned) */
-#define _PDCLIB_size unsigned long
+#define _PDCLIB_size unsigned int
 #define _PDCLIB_SIZE ULONG
 
 /* Large enough an integer to hold all character codes of the largest supported

src/pdclib/platform/stmos/include/sys/types.h

@@ -0,0 +1,2 @@
+// placeholder for gcc compilation
+

src/pdclib/platform/stmos/include/unistd.h

@@ -0,0 +1,6 @@
+#ifndef UNISTD_H_
+#define UNISTD_H_
+
+typedef int pid_t;
+
+#endif // UNISTD_H_