Add cross-compilation for Windows on Linux using MinGW. Check library dependencies of artifact
diff --git a/protoc-artifacts/build-protoc.sh b/protoc-artifacts/build-protoc.sh
index 714b1be..686010c 100755
--- a/protoc-artifacts/build-protoc.sh
+++ b/protoc-artifacts/build-protoc.sh
@@ -25,7 +25,8 @@
# Usage:
fail()
{
- echo "Error: $1"
+ echo "ERROR: $1"
+ echo
exit $E_ASSERT_FAILED
}
@@ -49,8 +50,11 @@
# Usage: checkArch <path-to-protoc>
checkArch ()
{
+ echo
+ echo "Checking for file format ..."
if [[ "$OS" == windows || "$OS" == linux ]]; then
format="$(objdump -f "$1" | grep -o "file format .*$" | grep -o "[^ ]*$")"
+ echo Format=$format
if [[ "$OS" == linux ]]; then
if [[ "$ARCH" == x86_32 ]]; then
assertEq $format "elf32-i386" $LINENO
@@ -71,6 +75,7 @@
fi
elif [[ "$OS" == osx ]]; then
format="$(file -b "$1" | grep -o "[^ ]*$")"
+ echo Format=$format
if [[ "$ARCH" == x86_32 ]]; then
assertEq $format "i386" $LINENO
elif [[ "$ARCH" == x86_64 ]]; then
@@ -79,8 +84,45 @@
fail "Unsupported arch: $ARCH"
fi
else
- fail "Unsupported system: $(uname)"
+ fail "Unsupported system: $OS"
fi
+ echo
+}
+
+# Checks the dependencies of the artifact. Artifacts should only depend on
+# system libraries.
+# Usage: checkDependencies <path-to-protoc>
+checkDependencies ()
+{
+ if [[ "$OS" == windows ]]; then
+ dump_cmd='objdump -x '"$1"' | fgrep "DLL Name"'
+ white_list="KERNEL32\.dll\|msvcrt\.dll"
+ elif [[ "$OS" == linux ]]; then
+ dump_cmd='ldd '"$1"
+ if [[ "$ARCH" == x86_32 ]]; then
+ white_list="linux-gate\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|ld-linux\.so\.2"
+ elif [[ "$ARCH" == x86_64 ]]; then
+ white_list="linux-vdso\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|ld-linux-x86-64\.so\.2"
+ fi
+ elif [[ "$OS" == osx ]]; then
+ dump_cmd='otool -L '"$1"
+ white_list="libz\.1\.dylib\|libc++\.1\.dylib\|libSystem\.B\.dylib"
+ fi
+ if [[ -z "$white_list" || -z "$dump_cmd" ]]; then
+ fail "Unsupported platform $OS-$ARCH."
+ fi
+ echo "Checking for expected dependencies ..."
+ eval $dump_cmd | grep -i "$white_list" || fail "doesn't show any expected dependencies"
+ echo "Checking for unexpected dependencies ..."
+ eval $dump_cmd | grep -i -v "$white_list"
+ ret=$?
+ if [[ $ret == 0 ]]; then
+ fail "found unexpected dependencies (listed above)."
+ elif [[ $ret != 1 ]]; then
+ fail "Error when checking dependencies."
+ fi # grep returns 1 when "not found", which is what we expect
+ echo "Dependencies look good."
+ echo
}
############################################################################
@@ -100,6 +142,7 @@
# Override the default value set in configure.ac that has '-g' which produces
# huge binary.
CXXFLAGS="-DNDEBUG"
+LDFLAGS=""
if [[ "$(uname)" == CYGWIN* ]]; then
assertEq "$OS" windows $LINENO
@@ -116,13 +159,28 @@
assertEq "$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="$CXXFLAGS -m32"
+ if [[ "$OS" == linux ]]; then
+ if [[ "$ARCH" == x86_64 ]]; then
+ CXXFLAGS="$CXXFLAGS -m64"
+ elif [[ "$ARCH" == x86_32 ]]; then
+ CXXFLAGS="$CXXFLAGS -m32"
+ else
+ fail "Unsupported arch: $ARCH"
+ fi
+ elif [[ "$OS" == windows ]]; then
+ # Cross-compilation for Windows
+ # TODO(zhangkun83) MinGW 64 always adds dependency on libwinpthread-1.dll,
+ # which is undesirable for repository deployment.
+ CONFIGURE_ARGS="$CONFIGURE_ARGS"
+ if [[ "$ARCH" == x86_64 ]]; then
+ CONFIGURE_ARGS="$CONFIGURE_ARGS --host=x86_64-w64-mingw32"
+ elif [[ "$ARCH" == x86_32 ]]; then
+ CONFIGURE_ARGS="$CONFIGURE_ARGS --host=i686-w64-mingw32"
+ else
+ fail "Unsupported arch: $ARCH"
+ fi
else
- fail "Unsupported arch: $ARCH"
+ fail "Cannot build $OS on $(uname)"
fi
elif [[ "$(uname)" == Darwin* ]]; then
assertEq "$OS" osx $LINENO
@@ -137,19 +195,19 @@
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"
+ LDFLAGS="$LDFLAGS -static-libgcc -static-libstdc++ -s"
fi
+export CXXFLAGS LDFLAGS
+
TARGET_FILE=target/protoc.exe
cd "$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
+ checkArch $TARGET_FILE && checkDependencies $TARGET_FILE
