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#!/bin/sh
#
# This is a wrapper around our toolchain that allows us to add a few
# compiler flags.
# The issue is that our toolchain are NDK-compatible, and hence enforces
# -fpic (and also -mfpmath=sse for x86) by default. When building the
# kernel, we need to disable this.
#
# Also support ccache compilation if USE_CCACHE is defined as "1"
#
# REAL_CROSS_COMPILE must be defined, and its value must be one of the
# CROSS_COMPILE values that are supported by the Kernel build system
# (e.g. "i686-linux-android-")
#
if [ -z "$REAL_CROSS_COMPILE" ]; then
echo "ERROR: The REAL_CROSS_COMPILE environment variable should be defined!"
exit 1
fi
# ARCH must also be defined before calling this script, e.g. 'arm' or 'x86'
#
if [ -z "$ARCH" ]; then
echo "ERROR: ARCH must be defined!"
exit 1
fi
# Common prefix for all fake toolchain programs, which are all really
# symlinks to this script, i.e.
#
# $PROGPREFIX-gcc --> $0
# $PROGPREFIX-ld --> $0
# etc...
#
PROGPREFIX=android-kernel-toolchain-
# Get program name, must be of the form $PROGPREFIX-<suffix>, where
# <suffix> can be 'gcc', 'ld', etc... We expect that the fake toolchain
# files are all symlinks to this script.
#
PROGNAME=$(basename "$0")
PROGSUFFIX=${PROGNAME##$PROGPREFIX}
EXTRA_FLAGS=
if [ "$PROGSUFFIX" = gcc ]; then
# Special case #1: For all, disable PIC code
EXTRA_FLAGS=$EXTRA_FLAGS" -fno-pic"
if [ "$ARCH" = "x86" ]; then
# Special case #2: For x86, disable SSE FPU arithmetic too
EXTRA_FLAGS=$EXTRA_FLAGS" -mfpmath=387"
fi
fi
# Invoke real cross-compiler toolchain program now
${REAL_CROSS_COMPILE}$PROGSUFFIX $EXTRA_FLAGS "$@"
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