Cytoplasm/configure

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#!/usr/bin/env sh
#
# Argument Parsing
#
echo "Build Configuration"
echo "-------------------"
BUILD="build"
OUT="out"
SRC="src"
INCLUDE="src/include"
TOOLS="tools"
CFLAGS="-Wall -Wextra -pedantic -std=c89 -O3 -pipe -D_DEFAULT_SOURCE -I${INCLUDE}"
LIBS="-lm -pthread"
# Set default args for all platforms
SCRIPT_ARGS="--lib-rtstub=RtStub --prefix=/usr/local --enable-ld-extra --lib-name=Cytoplasm --lib-version=0.4.0 --static $@"
# Set platform specific args
case "$(uname)" in
OpenBSD)
SCRIPT_ARGS="--with-libressl $SCRIPT_ARGS"
;;
*)
SCRIPT_ARGS="--with-openssl $SCRIPT_ARGS"
;;
esac
echo "Processing options..."
echo "Ran with arguments: $SCRIPT_ARGS"
# Process all arguments
for arg in $SCRIPT_ARGS; do
case "$arg" in
--with-openssl)
TLS_IMPL="OPENSSL"
TLS_LIBS="-lcrypto -lssl"
;;
--with-libressl)
TLS_IMPL="LIBRESSL"
TLS_LIBS="-ltls -lcrypto -lssl"
;;
--disable-tls)
TLS_LIBS=""
;;
--prefix=*)
PREFIX=$(echo "$arg" | cut -d '=' -f 2-)
;;
--enable-ld-extra)
LD_EXTRA="-flto -fdata-sections -ffunction-sections -s -Wl,-gc-sections"
;;
--disable-ld-extra)
LD_EXTRA=""
;;
--lib-name=*)
LIB_NAME=$(echo "$arg" | cut -d '=' -f 2-)
;;
--lib-version=*)
LIB_VERSION=$(echo "$arg" | cut -d '=' -f 2-)
;;
--enable-debug)
DEBUG="-O0 -g"
echo "Notice: --enable-debug implies --disable-ld-extra and --no-static."
echo "You must explicitly provide --enable-ld-extra and/or --static after"
echo "specifying --enable-debug if you wish to enable these features in debug mode."
LD_EXTRA=""
STATIC=""
;;
--disable-debug)
DEBUG=""
;;
--lib-rtstub=*)
STUB=$(echo "$arg" | cut -d '=' -f 2-)
;;
--static)
STATIC="-static -Wl,-static"
;;
--no-static)
STATIC=""
;;
*)
echo "Invalid argument: $1"
exit 1
;;
esac
done
if [ -n "$TLS_IMPL" ]; then
CFLAGS="${CFLAGS} -DTLS_IMPL=${TLS_IMPL}"
LIBS="${LIBS} ${TLS_LIBS}"
fi
CFLAGS="${CFLAGS} '-DLIB_NAME=\"${LIB_NAME}\"' '-DLIB_VERSION=\"${LIB_VERSION}\"' ${DEBUG}"
LDFLAGS="${LIBS} ${LD_EXTRA}"
#
# Makefile generation
#
collect() {
from="$1"
orig_ext="$2"
new_ext="$3"
prefix="$4"
exec="$5"
find "${from}" -name "*${orig_ext}" | while IFS= read -r src; do
src=$(echo "$src" | sed -e "s|^${from}||g")
obj=$(echo "$src" | sed -e "s|${orig_ext}\$|${new_ext}|g")
obj="${prefix}${obj}"
src="${from}${src}"
"${exec}" "${src}" "${obj}"
done
}
print_src() {
printf '%s ' "$1"
}
print_obj() {
printf '%s ' "$2"
}
compile_obj() {
src="$1"
obj="$2"
cc -I${INCLUDE} -MM -MT "${obj}" "${src}"
echo "${TAB}@mkdir -p $(dirname ${obj})"
echo "${TAB}\$(CC) \$(CFLAGS) -fPIC -c -o \"${obj}\" \"${src}\""
}
compile_bin() {
src="$1"
out="$2"
echo "${out}: ${OUT}/lib/lib${LIB_NAME}.a ${OUT}/lib/lib${LIB_NAME}.so ${OUT}/lib/${LIB_NAME}.o ${src}"
echo "${TAB}@mkdir -p ${OUT}/bin"
echo "${TAB}\$(CC) \$(CFLAGS) -o \"${out}\" \"${src}\" ${OUT}/lib/${LIB_NAME}.o -L${OUT}/lib \$(LDFLAGS) -l${LIB_NAME} ${STATIC}"
}
compile_doc() {
src="$1"
out="$2"
echo "${out}: ${OUT}/bin/hdoc ${src}"
echo "${TAB}@mkdir -p ${OUT}/man/man3"
echo "${TAB}${OUT}/bin/hdoc -D \"Os=${LIB_NAME}\" -i \"${src}\" -o \"${out}\""
}
echo "Generating Makefile..."
OBJS=$(collect ${SRC}/ .c .o ${BUILD}/ print_obj)
TAB=$(printf '\t')
cat << EOF > Makefile
.POSIX:
# Generated by '$0' on $(date).
# This file should generally not be manually edited.
PREFIX = ${PREFIX}
CFLAGS = ${CFLAGS}
LDFLAGS = ${LDFLAGS}
all: ${LIB_NAME} docs tools
docs: $(collect ${INCLUDE}/ .h .3 ${OUT}/man/man3/${LIB_NAME}- print_obj)
tools: $(collect ${TOOLS}/ .c '' ${OUT}/bin/ print_obj)
print-libs:
${TAB}@echo ${LIBS}
format:
${TAB}find . -name '*.c' | while IFS= read -r src; do \\
${TAB} if indent "\$\$src"; then \\
${TAB} rm \$\$(basename "\$\$src").BAK; \\
${TAB} fi \\
${TAB}done
license:
${TAB}find . -name '*.[ch]' | while IFS= read -r src; do \\
${TAB} srcHeader=\$\$(grep -n -m 1 '^ \*/' "\$\$src" | cut -d ':' -f 1); \\
${TAB} head -n\$\$srcHeader \$\$src | \\
${TAB} diff -u -p - "LICENSE.txt" | \\
${TAB} patch "\$\$src" | grep -v "^Hmm"; \\
${TAB}done
${LIB_NAME}: ${OUT}/lib/${LIB_NAME}.o ${OUT}/lib/lib${LIB_NAME}.a ${OUT}/lib/lib${LIB_NAME}.so
clean:
${TAB}rm -r "${BUILD}" "${OUT}"
${OUT}/lib/${LIB_NAME}.o: ${BUILD}/${STUB}.o
${TAB}@mkdir -p ${OUT}/lib
${TAB}cp ${BUILD}/${STUB}.o ${OUT}/lib/${LIB_NAME}.o
${OUT}/lib/lib${LIB_NAME}.a: ${OBJS}
${TAB}@mkdir -p ${OUT}/lib
${TAB}\$(AR) rcs ${OUT}/lib/lib${LIB_NAME}.a ${OBJS}
${OUT}/lib/lib${LIB_NAME}.so: ${OBJS}
${TAB}@mkdir -p ${OUT}/lib
${TAB}\$(CC) -shared -o ${OUT}/lib/lib${LIB_NAME}.so ${OBJS} ${LDFLAGS}
$(collect ${SRC}/ .c .o ${BUILD}/ compile_obj)
$(collect ${TOOLS}/ .c '' ${OUT}/bin/ compile_bin)
$(collect ${INCLUDE}/ .h .3 ${OUT}/man/man3/${LIB_NAME}- compile_doc)
EOF
echo "Done. Run 'make' to build ${LIB_NAME}."