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authorGravatar Manuel Novoa III <mjn3@codepoet.org>2004-01-16 19:08:39 +0000
committerGravatar Manuel Novoa III <mjn3@codepoet.org>2004-01-16 19:08:39 +0000
commit93e576b799bacbe419b1c442d116b41734f8d03b (patch)
tree649a06c045b54355eb421b7d1f71c80038b5f419 /Makefile
parent2d472b2334f683eff884f3e9c8e63f0c02bfa6b7 (diff)
downloadbuildroot-93e576b799bacbe419b1c442d116b41734f8d03b.tar.gz
buildroot-93e576b799bacbe419b1c442d116b41734f8d03b.tar.bz2
Get soft float working for gcc 3.3.2. Support for arm, mips, mipsel, powerpc.
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile31
1 files changed, 14 insertions, 17 deletions
diff --git a/Makefile b/Makefile
index ed84e7059c..c1d6b4987d 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,6 @@ ARCH:=i386
#ARCH:=arm
#ARCH:=mips
#ARCH:=mipsel
-# Possible issues remaining with powerpc and soft float.
#ARCH:=powerpc
#ARCH:=sh4
# Busybox link failing due to needing libgcc functions that are statics.
@@ -49,9 +48,8 @@ ARCH:=i386
# Enable this if you want to use an <arch>-linux-uclibc-* toolchain.
# Note that, to avoid configure problems with apps that don't support
# this tupple, we also put <arch>-linux-* symlinks in staging_dir/bin.
-# WARNING -- This does not yet support soft-float builds.
+# This is the preferred approach now.
USE_LINUX_UCLIBC:=true
-#USE_LINUX_UCLIBC:=false
# If you are building a native gcc toolchain, do you want to
# build the old gcc-2.95 based toolchain, or would you prefer
@@ -82,6 +80,8 @@ WGET:=wget --passive-ftp
ifeq ($(USE_LINUX_UCLIBC),true)
OPTIMIZE_FOR_CPU=$(ARCH)
#OPTIMIZE_FOR_CPU=i686
+# Note... gcc 2.95 does not seem to like anything higher than i586.
+#OPTIMIZE_FOR_CPU=i586
#OPTIMIZE_FOR_CPU=whatever
else
# WARNING!!! CURRENTLY BROKEN!!! LEAVE IT AS $(ARCH)!!!
@@ -91,15 +91,16 @@ endif
# Soft floating point options.
# Notes:
-# Currently builds with gcc 3.3 for i386, arm, mips, mipsel.
+# Currently builds with gcc 3.3 for arm, mips, mipsel, powerpc.
+# (i386 support will be added back in at some point.)
# Only tested with multilib enabled.
# For i386, long double is the same as double (64 bits). While this
# is unusual for x86, it seemed the best approach considering the
# limitations in the gcc floating point emulation library.
# For arm, soft float uses the usual libfloat routines.
-# The uClibc built will support _only_ applications compiled with the
-# -msoft-float flag. To avoid CFLAGS problems, you may want to use
-# scripts similar to those in the build*/staging_dir/bin directory.
+# Custom specs files are used to set the default gcc mode to soft float
+# as a convenience, since you shouldn't link hard and soft float
+# together. In fact, arm won't even let you.
# (Un)comment the appropriate line below.
#SOFT_FLOAT:=true
SOFT_FLOAT:=false
@@ -212,11 +213,6 @@ TARGETS+=ext2root
#
#############################################################
-# The new stuff doesn't support soft float yet.
-ifeq ($(USE_LINUX_UCLIBC),true)
-SOFT_FLOAT:=false
-endif
-
ifeq ($(SOFT_FLOAT),true)
SOFT_FLOAT_CONFIG_OPTION:=--without-float
TARGET_SOFT_FLOAT:=-msoft-float
@@ -243,7 +239,7 @@ endif
ifneq ($(BUILD_WITH_LARGEFILE),true)
DISABLE_LARGEFILE= --disable-largefile
endif
-TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING) $(TARGET_SOFT_FLOAT)
+TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)
HOSTCC:=gcc
BASE_DIR:=${shell pwd}
@@ -269,7 +265,7 @@ KERNEL_CROSS=$(STAGING_DIR)/bin/$(OPTIMIZE_FOR_CPU)-linux-
TARGET_CROSS=$(STAGING_DIR)/bin/$(OPTIMIZE_FOR_CPU)-linux-
endif
-TARGET_CC=$(TARGET_CROSS)gcc$(TARGET_SOFT_FLOAT)
+TARGET_CC=$(TARGET_CROSS)gcc
STRIP=$(TARGET_CROSS)strip --remove-section=.comment --remove-section=.note
@@ -291,10 +287,11 @@ TARGET_CONFIGURE_OPTS=PATH=$(TARGET_PATH) \
AS=$(TARGET_CROSS)as \
LD=$(TARGET_CROSS)ld \
NM=$(TARGET_CROSS)nm \
- CC=$(TARGET_CROSS)gcc$(TARGET_SOFT_FLOAT) \
- GCC=$(TARGET_CROSS)gcc$(TARGET_SOFT_FLOAT) \
- CXX=$(TARGET_CROSS)g++$(TARGET_SOFT_FLOAT) \
+ CC=$(TARGET_CROSS)gcc \
+ GCC=$(TARGET_CROSS)gcc \
+ CXX=$(TARGET_CROSS)g++ \
RANLIB=$(TARGET_CROSS)ranlib
+
ifeq ($(ENABLE_LOCALE),true)
DISABLE_NLS:=
else