1 #!/bin/sh 2 # 3 # This is a wrapper around our toolchain that allows us to add a few 4 # compiler flags. 5 # The issue is that our toolchain are NDK-compatible, and hence enforces 6 # -fpic (and also -mfpmath=sse for x86) by default. When building the 7 # kernel, we need to disable this. 8 # 9 # Also support ccache compilation if USE_CCACHE is defined as "1" 10 # 11 12 # REAL_CROSS_COMPILE must be defined, and its value must be one of the 13 # CROSS_COMPILE values that are supported by the Kernel build system 14 # (e.g. "i686-linux-android-") 15 # 16 if [ -z "$REAL_CROSS_COMPILE" ]; then 17 echo "ERROR: The REAL_CROSS_COMPILE environment variable should be defined!" 18 exit 1 19 fi 20 21 # ARCH must also be defined before calling this script, e.g. 'arm' or 'x86' 22 # 23 if [ -z "$ARCH" ]; then 24 echo "ERROR: ARCH must be defined!" 25 exit 1 26 fi 27 28 # Common prefix for all fake toolchain programs, which are all really 29 # symlinks to this script, i.e. 30 # 31 # $PROGPREFIX-gcc --> $0 32 # $PROGPREFIX-ld --> $0 33 # etc... 34 # 35 PROGPREFIX=android-kernel-toolchain- 36 37 # Get program name, must be of the form $PROGPREFIX-<suffix>, where 38 # <suffix> can be 'gcc', 'ld', etc... We expect that the fake toolchain 39 # files are all symlinks to this script. 40 # 41 PROGNAME=$(basename "$0") 42 PROGSUFFIX=${PROGNAME##$PROGPREFIX} 43 44 EXTRA_FLAGS= 45 46 if [ "$PROGSUFFIX" = gcc ]; then 47 # Special case #1: For all, disable PIC code 48 EXTRA_FLAGS=$EXTRA_FLAGS" -fno-pic" 49 if [ "$ARCH" = "x86" ]; then 50 # Special case #2: For x86, disable SSE FPU arithmetic too 51 EXTRA_FLAGS=$EXTRA_FLAGS" -mfpmath=387" 52 fi 53 fi 54 55 # Invoke real cross-compiler toolchain program now 56 ${REAL_CROSS_COMPILE}$PROGSUFFIX $EXTRA_FLAGS "$@" 57
