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59 lines
1.6 KiB
59 lines
1.6 KiB
#!/bin/sh
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#
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# This is a wrapper around our toolchain that allows us to add a few
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# compiler flags.
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# The issue is that our toolchain are NDK-compatible, and hence enforces
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# -fpic (and also -mfpmath=sse for x86) by default. When building the
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# kernel, we need to disable this.
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#
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# Also support ccache compilation if USE_CCACHE is defined as "1"
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#
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# REAL_CROSS_COMPILE must be defined, and its value must be one of the
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# CROSS_COMPILE values that are supported by the Kernel build system
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# (e.g. "i686-linux-android-")
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#
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if [ -z "$REAL_CROSS_COMPILE" ]; then
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echo "ERROR: The REAL_CROSS_COMPILE environment variable should be defined!"
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exit 1
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fi
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# ARCH must also be defined before calling this script, e.g. 'arm' or 'x86'
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#
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if [ -z "$ARCH" ]; then
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echo "ERROR: ARCH must be defined!"
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exit 1
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fi
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# Common prefix for all fake toolchain programs, which are all really
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# symlinks to this script, i.e.
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#
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# $PROGPREFIX-gcc --> $0
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# $PROGPREFIX-ld --> $0
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# etc...
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#
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PROGPREFIX=android-kernel-toolchain-
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# Get program name, must be of the form $PROGPREFIX-<suffix>, where
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# <suffix> can be 'gcc', 'ld', etc... We expect that the fake toolchain
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# files are all symlinks to this script.
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#
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PROGNAME=$(basename "$0")
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PROGSUFFIX=${PROGNAME##$PROGPREFIX}
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EXTRA_FLAGS=
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if [ "$PROGSUFFIX" = gcc ]; then
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# Special case #1: For all, disable PIC code
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EXTRA_FLAGS=$EXTRA_FLAGS" -fno-pic"
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case $ARCH in
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x86)
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# Special case #2: For x86, disable SSE FPU arithmetic too
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EXTRA_FLAGS=$EXTRA_FLAGS" -m32 -mfpmath=387"
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;;
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esac
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fi
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# Invoke real cross-compiler toolchain program now
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${REAL_CROSS_COMPILE}$PROGSUFFIX $EXTRA_FLAGS "$@"
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