diff options
Diffstat (limited to 'extra/gcc-uClibc')
| -rw-r--r-- | extra/gcc-uClibc/Makefile | 40 | ||||
| -rw-r--r-- | extra/gcc-uClibc/gcc-uClibc.c | 129 |
2 files changed, 169 insertions, 0 deletions
diff --git a/extra/gcc-uClibc/Makefile b/extra/gcc-uClibc/Makefile new file mode 100644 index 000000000..af9f836a1 --- /dev/null +++ b/extra/gcc-uClibc/Makefile @@ -0,0 +1,40 @@ + +TOPDIR = ../../ +include $(TOPDIR)Rules.mak + +UCLIBC_DIR = $(shell (cd ../.. ; /bin/pwd)) +GCC_BIN = $(CC) +GCC_LIB = $(shell $(CC) -print-libgcc-file-name ) +#GCCINCDIR inherited from Rules.mak + +NATIVE_ARCH = $(shell uname -m | sed -e 's/i.86/i386/' -e 's/sparc.*/sparc/' -e 's/arm.*/arm/g') +GCC_UCLIBC = gcc-uClibc-cross +ifeq ($(TARGET_ARCH), $(NATIVE_ARCH)) + GCC_UCLIBC = gcc-uClibc-native +endif + +all: $(GCC_UCLIBC) + +clean: + rm -f gcc-uClibc.h gcc-uClibc-* + +gcc-uClibc.h: clean + echo "/* this file is created by make */" > gcc-uClibc.h + echo "#define UCLIBC_DIR " \"$(UCLIBC_DIR)/\" >> gcc-uClibc.h + echo "#define GCC_BIN " \"$(GCC_BIN)\" >> gcc-uClibc.h + echo "#define GCC_LIB " \"$(GCC_LIB)\" >> gcc-uClibc.h + echo "#define GCC_INCDIR " \"-I$(GCCINCDIR)/\" >> gcc-uClibc.h + echo "#define TARGET_ARCH " \"$(TARGET_ARCH)\" >> gcc-uClibc.h + +gcc-uClibc-native: gcc-uClibc.h gcc-uClibc.c + # uClibc built for native environment, so why not use it ;-) + $(CC) $(CFLAGS) -nostdinc -I$(UCLIBC_DIR)/include -I$(GCC_INC) \ + -Wl,-static gcc-uClibc.c \ + $(UCLIBC_DIR)/sysdeps/linux/$(TARGET_ARCH)/_start.o \ + -nostdlib $(GCC_LIB) $(UCLIBC_DIR)/libc.a \ + -s -o gcc-uClibc-$(TARGET_ARCH) #-DDEBUG + +gcc-uClibc-cross: gcc-uClibc.h gcc-uClibc.c + # don't use CFLAGS since may not be appropriate + gcc -s gcc-uClibc.c -o gcc-uClibc-$(TARGET_ARCH) + diff --git a/extra/gcc-uClibc/gcc-uClibc.c b/extra/gcc-uClibc/gcc-uClibc.c new file mode 100644 index 000000000..f783cd7bd --- /dev/null +++ b/extra/gcc-uClibc/gcc-uClibc.c @@ -0,0 +1,129 @@ + +/* + * Copyright (C) 2000 Manuel Novoa III + * + * This is a crude wrapper to use uClibc with gcc. + * It was originally written to work around ./configure for ext2fs-utils. + * It certainly can be improved, but it works for me in the normal cases. + * + * TODO: + * Check/modify gcc-specific environment variables? + */ + +#ifdef DEBUG +#include <stdio.h> +#endif + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "gcc-uClibc.h" + +#define UCLIBC_START UCLIBC_DIR"sysdeps/linux/"TARGET_ARCH"/_start.o" +#define UCLIBC_START_G UCLIBC_START +#define UCLIBC_LIB UCLIBC_DIR"libc.a" +#if 1 +#define UCLIBC_LIB_G UCLIBC_LIB +#else +#define UCLIBC_LIB_G UCLIBC_DIR"libc.a-debug" +#endif +#define UCLIBC_INC "-I"UCLIBC_DIR"include/" + +static char nostdinc[] = "-nostdinc"; +static char nostartfiles[] = "-nostartfiles"; +static char nodefaultlibs[] = "-nodefaultlibs"; +static char nostdlib[] = "-nostdlib"; + +int main(int argc, char **argv) +{ + int debugging = 0, linking = 1; + int use_stdinc = 1, use_start = 1, use_stdlib = 1; + int i, j; + int source_count; + char ** gcc_argv; + + source_count = 0; + + for ( i = 1 ; i < argc ; i++ ) { + if (argv[i][0] == '-') { /* option */ + switch (argv[i][1]) { + case 'c': + case 'S': + case 'E': + case 'r': + if (argv[i][2] == 0) linking = 0; + break; + case 'g': + if (argv[i][2] == 0) debugging = 1; + break; + case 'n': + if (strcmp(nostdinc,argv[i]) == 0) { + use_stdinc = 0; + } else if (strcmp(nostartfiles,argv[i]) == 0) { + use_start = 0; + } else if (strcmp(nodefaultlibs,argv[i]) == 0) { + use_stdlib = 0; + } else if (strcmp(nostdlib,argv[i]) == 0) { + use_start = 0; + use_stdlib = 0; + } + + } + } else { /* assume it is an existing source file */ + ++source_count; + } + } + +#if 1 + gcc_argv = __builtin_alloca(sizeof(char*) * (argc + 20)); +#else + if (!(gcc_argv = malloc(sizeof(char) * (argc + 20)))) { + return EXIT_FAILURE; + } +#endif + + i = 0; + gcc_argv[i++] = GCC_BIN; + for ( j = 1 ; j < argc ; j++ ) { + gcc_argv[i++] = argv[j]; + } + if (use_stdinc) { + gcc_argv[i++] = nostdinc; + gcc_argv[i++] = UCLIBC_INC; + gcc_argv[i++] = GCC_INCDIR; + } + if (linking && source_count) { + gcc_argv[i++] = "-static"; + if (use_start) { + if (debugging) { + gcc_argv[i++] = UCLIBC_START_G; + } else { + gcc_argv[i++] = UCLIBC_START; + } + } + if (use_stdlib) { + gcc_argv[i++] = "-nostdlib"; + if (debugging) { + gcc_argv[i++] = UCLIBC_LIB_G; + } else { + gcc_argv[i++] = UCLIBC_LIB; + } + gcc_argv[i++] = GCC_LIB; + } + } + gcc_argv[i++] = NULL; + +#ifdef DEBUG + for ( j = 0 ; gcc_argv[j] ; j++ ) { + printf("arg[%2i] = %s\n", j, gcc_argv[j]); + } + return EXIT_SUCCESS; +#else + return execvp(GCC_BIN, gcc_argv); +#endif +} + + + + |