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#!/bin/bash
# Builds protoc executable into target/protoc.exe
# To be run from Maven.
# Usage: build-protoc.sh <OS> <ARCH>
# <OS> and <ARCH> are ${os.detected.name} and ${os.detected.arch} from os-maven-plugin
OS=$1
ARCH=$2
if [[ $# < 2 ]]; then
echo "No arguments provided. This script is intended to be run from Maven."
exit 1
fi
# Under Cygwin, bash doesn't have these in PATH when called from Maven which
# runs in Windows version of Java.
export PATH="/bin:/usr/bin:$PATH"
############################################################################
# Helper functions
############################################################################
E_PARAM_ERR=98
E_ASSERT_FAILED=99
# Usage:
fail()
{
echo "Error: $1"
exit $E_ASSERT_FAILED
}
# Usage: assertEq VAL1 VAL2 $LINENO
assertEq ()
{
lineno=$3
if [ -z "$lineno" ]; then
echo "lineno not given"
exit $E_PARAM_ERR
fi
if [[ "$1" != "$2" ]]; then
echo "Assertion failed: \"$1\" == \"$2\""
echo "File \"$0\", line $lineno" # Give name of file and line number.
exit $E_ASSERT_FAILED
fi
}
# Checks the artifact is for the expected architecture
# Usage: checkArch <path-to-protoc>
checkArch ()
{
if [[ "$OS" == windows || "$OS" == linux ]]; then
format="$(objdump -f "$1" | grep -o "file format .*$" | grep -o "[^ ]*$")"
if [[ "$OS" == linux ]]; then
if [[ "$ARCH" == x86_32 ]]; then
assertEq $format "elf32-i386" $LINENO
elif [[ "$ARCH" == x86_64 ]]; then
assertEq $format "elf64-x86-64" $LINENO
else
fail "Unsupported arch: $ARCH"
fi
else
# $OS == windows
if [[ "$ARCH" == x86_32 ]]; then
assertEq $format "pei-i386" $LINENO
elif [[ "$ARCH" == x86_64 ]]; then
assertEq $format "pei-x86-64" $LINENO
else
fail "Unsupported arch: $ARCH"
fi
fi
elif [[ "$OS" == osx ]]; then
format="$(file -b "$1" | grep -o "[^ ]*$")"
if [[ "$ARCH" == x86_32 ]]; then
assertEq $format "i386" $LINENO
elif [[ "$ARCH" == x86_64 ]]; then
assertEq $format "x86_64" $LINENO
else
fail "Unsupported arch: $ARCH"
fi
else
fail "Unsupported system: $(uname)"
fi
}
############################################################################
echo "Building protoc, OS=$OS ARCH=$ARCH"
# Nested double quotes are unintuitive, but it works.
cd "$(dirname "$0")"
WORKING_DIR=$(pwd)
CONFIGURE_ARGS="--disable-shared"
MAKE_TARGET="protoc"
if [[ "$OS" == windows ]]; then
MAKE_TARGET="${MAKE_TARGET}.exe"
fi
# Override the default value set in configure.ac that has '-g' which produces
# huge binary.
CXXFLAGS="-DNDEBUG"
if [[ "$(uname)" == CYGWIN* ]]; then
assertEq "$OS" windows $LINENO
# Use mingw32 compilers because executables produced by Cygwin compiler
# always have dependency on Cygwin DLL.
if [[ "$ARCH" == x86_64 ]]; then
CONFIGURE_ARGS="$CONFIGURE_ARGS --host=x86_64-w64-mingw32"
elif [[ "$ARCH" == x86_32 ]]; then
CONFIGURE_ARGS="$CONFIGURE_ARGS --host=i686-pc-mingw32"
else
fail "Unsupported arch by CYGWIN: $ARCH"
fi
elif [[ "$(uname)" == MINGW32* ]]; then
assertEq "$OS" windows $LINENO
assertEq "$ARCH" x86_32 $LINENO
elif [[ "$(uname)" == Linux* ]]; then
assertEq "$OS" linux $LINENO
if [[ "$ARCH" == x86_64 ]]; then
CXXFLAGS="$CXXFLAGS -m64"
elif [[ "$ARCH" == x86_32 ]]; then
CXXFLAGS="$CXXFLAGS -m32"
else
fail "Unsupported arch: $ARCH"
fi
elif [[ "$(uname)" == Darwin* ]]; then
assertEq "$OS" osx $LINENO
if [[ "$ARCH" == x86_64 ]]; then
CXXFLAGS="$CXXFLAGS -m64"
elif [[ "$ARCH" == x86_32 ]]; then
CXXFLAGS="$CXXFLAGS -m32"
else
fail "Unsupported arch: $ARCH"
fi
else
fail "Unsupported system: $(uname)"
fi
export CXXFLAGS
# Statically link libgcc and libstdc++.
# -s to produce stripped binary.
# And they don't work under Mac.
if [[ "$OS" != osx ]]; then
export LDFLAGS="-static-libgcc -static-libstdc++ -s"
fi
TARGET_FILE=target/protoc.exe
cd "$WORKING_DIR"/.. && ./configure $CONFIGURE_ARGS &&
cd src && make clean && make $MAKE_TARGET &&
cd "$WORKING_DIR" && mkdir -p target &&
(cp ../src/protoc $TARGET_FILE || cp ../src/protoc.exe $TARGET_FILE) &&
checkArch $TARGET_FILE
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