# Binary utilities.
# If the host appears to be x86, use the normal tools.
+# If it's x86-64, use the compiler and linker in 32-bit mode.
# Otherwise assume cross-tools are installed as i386-elf-*.
X86 = i.86\|pentium.*\|[pk][56]\|nexgen\|viac3\|6x86\|athlon.*
+X86_64 = x86_64
ifneq (0, $(shell expr `uname -m` : '$(X86)'))
-CC = gcc
-LD = ld
-OBJCOPY = objcopy
+ CC = gcc
+ LD = ld
+ OBJCOPY = objcopy
else
-CC = i386-elf-gcc
-LD = i386-elf-ld
-OBJCOPY = i386-elf-objcopy
+ ifneq (0, $(shell expr `uname -m` : '$(X86_64)'))
+ CC = gcc -m32
+ LD = ld -melf_i386
+ OBJCOPY = objcopy
+ else
+ CC = i386-elf-gcc
+ LD = i386-elf-ld
+ OBJCOPY = i386-elf-objcopy
+ endif
+endif
+
+ifeq ($(strip $(shell command -v $(CC) 2> /dev/null)),)
+$(warning *** Compiler ($(CC)) not found. Did you set $$PATH properly? Please refer to the Getting Started section in the documentation for details. ***)
endif
# Compiler and assembler invocation.
DEFINES =
WARNINGS = -Wall -W -Wstrict-prototypes -Wmissing-prototypes -Wsystem-headers
-CFLAGS = -g -MMD -msoft-float -masm=intel
-CPPFLAGS = -nostdinc -I$(SRCDIR) -I- -I$(SRCDIR)/lib
+CFLAGS = -g -MMD -msoft-float -O
+CPPFLAGS = -nostdinc -I$(SRCDIR) -I$(SRCDIR)/lib
ASFLAGS = -Wa,--gstabs -MMD
LDFLAGS =