mirror of https://github.com/martanne/abduco
Add configure script to detect compiler flags and feature test macros
This is the same musl originated configure script as vis uses.
This commit is contained in:
Marc André Tanner
parent
1f1c02a3b0
commit
66a17ed03d
46
Makefile
46
Makefile
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@ -1,45 +1,37 @@
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include config.mk
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-include config.mk
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VERSION = 0.6
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CFLAGS_STD ?= -std=c99 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -DNDEBUG
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CFLAGS_STD += -DVERSION=\"${VERSION}\"
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LDFLAGS_STD ?= -lc -lutil
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STRIP ?= strip
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SRC = abduco.c
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OBJ = ${SRC:.c=.o}
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all: clean options abduco
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options:
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@echo abduco build options:
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@echo "CFLAGS = ${CFLAGS}"
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@echo "LDFLAGS = ${LDFLAGS}"
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@echo "CC = ${CC}"
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all: abduco
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config.h:
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cp config.def.h config.h
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.c.o:
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@echo CC $<
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@${CC} -c ${CFLAGS} $<
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config.mk:
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@touch $@
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${OBJ}: config.h config.mk
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abduco: ${OBJ}
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@echo CC -o $@
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@${CC} -o $@ ${OBJ} ${LDFLAGS}
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abduco: config.h config.mk *.c
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${CC} ${CFLAGS} ${CFLAGS_STD} ${CFLAGS_AUTO} ${CFLAGS_EXTRA} ${SRC} ${LDFLAGS} ${LDFLAGS_STD} ${LDFLAGS_AUTO} -o $@
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debug: clean
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@make CFLAGS='${DEBUG_CFLAGS}'
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make CFLAGS_EXTRA='${CFLAGS_DEBUG}'
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clean:
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@echo cleaning
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@rm -f abduco ${OBJ} abduco-${VERSION}.tar.gz
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@rm -f abduco abduco-*.tar.gz
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dist: clean
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@echo creating dist tarball
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@mkdir -p abduco-${VERSION}
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@cp -R LICENSE Makefile README.md testsuite.sh config.def.h config.mk \
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${SRC} debug.c client.c server.c forkpty-aix.c forkpty-sunos.c \
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abduco.1 abduco-${VERSION}
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@tar -cf abduco-${VERSION}.tar abduco-${VERSION}
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@gzip abduco-${VERSION}.tar
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@rm -rf abduco-${VERSION}
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@git archive --prefix=abduco-${VERSION}/ -o abduco-${VERSION}.tar.gz HEAD
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install: abduco
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@echo stripping executable
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@ -59,4 +51,4 @@ uninstall:
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@echo removing manual page from ${DESTDIR}${MANPREFIX}/man1
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@rm -f ${DESTDIR}${MANPREFIX}/man1/abduco.1
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.PHONY: all options clean dist install uninstall debug
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.PHONY: all clean dist install uninstall debug
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@ -42,7 +42,7 @@ with sha1sum
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compile and install it
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$EDITOR config.mk && make && sudo make install
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./configure && make && sudo make install
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or use one of the distribution provided binary packages:
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19
config.mk
19
config.mk
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@ -1,19 +0,0 @@
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# abduco version
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VERSION = 0.6
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# Customize below to fit your system
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PREFIX ?= /usr/local
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MANPREFIX = ${PREFIX}/share/man
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INCS = -I.
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LIBS = -lc -lutil
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CPPFLAGS = -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700
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CFLAGS += -std=c99 -pedantic -Wall ${INCS} -DVERSION=\"${VERSION}\" -DNDEBUG ${CPPFLAGS}
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LDFLAGS += ${LIBS}
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DEBUG_CFLAGS = ${CFLAGS} -UNDEBUG -O0 -g -ggdb
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CC ?= cc
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STRIP ?= strip
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@ -0,0 +1,244 @@
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#!/bin/sh
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# Based on the configure script from musl libc, MIT licensed
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usage () {
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cat <<EOF
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Usage: $0 [OPTION]... [VAR=VALUE]...
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To assign environment variables (e.g., CC, CFLAGS...), specify them as
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VAR=VALUE. See below for descriptions of some of the useful variables.
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Defaults for the options are specified in brackets.
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Configuration:
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--srcdir=DIR source directory [detected]
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Installation directories:
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--prefix=PREFIX main installation prefix [/usr/local]
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--exec-prefix=EPREFIX installation prefix for executable files [PREFIX]
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Fine tuning of the installation directories:
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--bindir=DIR user executables [EPREFIX/bin]
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--sharedir=DIR share directories [PREFIX/share]
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--docdir=DIR misc. documentation [PREFIX/share/doc]
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--mandir=DIR man pages [PREFIX/share/man]
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Some influential environment variables:
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CC C compiler command [detected]
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CFLAGS C compiler flags [-Os -pipe ...]
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LDFLAGS Linker flags
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Use these variables to override the choices made by configure.
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EOF
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exit 0
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}
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# Helper functions
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quote () {
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tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
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$1
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EOF
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printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#"
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}
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echo () { printf "%s\n" "$*" ; }
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fail () { echo "$*" ; exit 1 ; }
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fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; }
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cmdexists () { type "$1" >/dev/null 2>&1 ; }
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trycc () { test -z "$CC" && cmdexists "$1" && CC=$1 ; }
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stripdir () {
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while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done
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}
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trycppif () {
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printf "checking preprocessor condition %s... " "$1"
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echo "typedef int x;" > "$tmpc"
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echo "#if $1" >> "$tmpc"
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echo "#error yes" >> "$tmpc"
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echo "#endif" >> "$tmpc"
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if $CC $2 -c -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
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printf "false\n"
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return 1
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else
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printf "true\n"
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return 0
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fi
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}
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tryflag () {
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printf "checking whether compiler accepts %s... " "$2"
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echo "typedef int x;" > "$tmpc"
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if $CC $CFLAGS_TRY $2 -c -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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eval "$1=\"\${$1} \$2\""
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eval "$1=\${$1# }"
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return 0
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else
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printf "no\n"
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return 1
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fi
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}
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tryldflag () {
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printf "checking whether linker accepts %s... " "$2"
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echo "typedef int x;" > "$tmpc"
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if $CC $LDFLAGS_TRY -nostdlib -shared "$2" -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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eval "$1=\"\${$1} \$2\""
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eval "$1=\${$1# }"
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return 0
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else
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printf "no\n"
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return 1
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fi
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}
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# Beginning of actual script
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CFLAGS_AUTO=
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CFLAGS_TRY=
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LDFLAGS_AUTO=
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LDFLAGS_TRY=
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SRCDIR=
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PREFIX=/usr/local
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EXEC_PREFIX='$(PREFIX)'
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BINDIR='$(EXEC_PREFIX)/bin'
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MANDIR='$(PREFIX)/share/man'
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for arg ; do
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case "$arg" in
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--help|-h) usage ;;
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--srcdir=*) SRCDIR=${arg#*=} ;;
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--prefix=*) PREFIX=${arg#*=} ;;
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--exec-prefix=*) EXEC_PREFIX=${arg#*=} ;;
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--bindir=*) BINDIR=${arg#*=} ;;
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--sharedir=*) SHAREDIR=${arg#*=} ;;
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--docdir=*) DOCDIR=${arg#*=} ;;
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--mandir=*) MANDIR=${arg#*=} ;;
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--enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;;
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-* ) echo "$0: unknown option $arg" ;;
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CC=*) CC=${arg#*=} ;;
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CFLAGS=*) CFLAGS=${arg#*=} ;;
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CPPFLAGS=*) CPPFLAGS=${arg#*=} ;;
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LDFLAGS=*) LDFLAGS=${arg#*=} ;;
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*=*) ;;
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*) ;;
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esac
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done
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for i in SRCDIR PREFIX EXEC_PREFIX BINDIR MANDIR ; do
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stripdir $i
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done
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#
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# Get the source dir for out-of-tree builds
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#
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if test -z "$SRCDIR" ; then
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SRCDIR="${0%/configure}"
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stripdir SRCDIR
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fi
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abs_builddir="$(pwd)" || fail "$0: cannot determine working directory"
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abs_srcdir="$(cd $SRCDIR && pwd)" || fail "$0: invalid source directory $SRCDIR"
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test "$abs_srcdir" = "$abs_builddir" && SRCDIR=.
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test "$SRCDIR" != "." -a -f Makefile -a ! -h Makefile && fail "$0: Makefile already exists in the working directory"
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#
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# Get a temp filename we can use
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#
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i=0
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set -C
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while : ; do i=$(($i+1))
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tmpc="./conf$$-$PPID-$i.c"
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tmpo="./conf$$-$PPID-$i.o"
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2>|/dev/null > "$tmpc" && break
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test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc"
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done
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set +C
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trap 'rm -f "$tmpc" "$tmpo"' EXIT INT QUIT TERM HUP
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#
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# Find a C compiler to use
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#
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printf "checking for C compiler... "
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trycc cc
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trycc gcc
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trycc clang
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printf "%s\n" "$CC"
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test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
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printf "checking whether C compiler works... "
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echo "typedef int x;" > "$tmpc"
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if output=$($CC $CPPFLAGS $CFLAGS -c -o "$tmpo" "$tmpc" 2>&1) ; then
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printf "yes\n"
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else
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printf "no; compiler output follows:\n%s\n" "$output"
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exit 1
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fi
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#
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# Figure out options to force errors on unknown flags.
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#
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tryflag CFLAGS_TRY -Werror=unknown-warning-option
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tryflag CFLAGS_TRY -Werror=unused-command-line-argument
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tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
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tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
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CFLAGS_STD="-std=c99 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -DNDEBUG -D_FORTIFY_SOURCE=2"
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LDFLAGS_STD="-lc -lutil"
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OS=$(uname)
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case "$OS" in
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FreeBSD) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE -D__BSD_VISIBLE=1" ;;
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*BSD) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE" ;;
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Darwin) CFLAGS_STD="$CFLAGS_STD -D_DARWIN_C_SOURCE" ;;
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AIX) CFLAGS_STD="$CFLAGS_STD -D_ALL_SOURCE" ;;
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esac
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tryflag CFLAGS -pipe
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# Try flags to optimize binary size
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tryflag CFLAGS -Os
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tryflag CFLAGS -ffunction-sections
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tryflag CFLAGS -fdata-sections
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tryldflag LDFLAGS_AUTO -Wl,--gc-sections
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# Try hardening flags
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tryflag CFLAGS -fPIE
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tryflag CFLAGS_AUTO -fstack-protector-all
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tryldflag LDFLAGS -Wl,-z,now
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tryldflag LDFLAGS -Wl,-z,relro
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tryldflag LDFLAGS_AUTO -pie
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printf "creating config.mk... "
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cmdline=$(quote "$0")
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for i ; do cmdline="$cmdline $(quote "$i")" ; done
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exec 3>&1 1>config.mk
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cat << EOF
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# This version of config.mk was generated by:
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# $cmdline
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# Any changes made here will be lost if configure is re-run
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SRCDIR = $SRCDIR
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PREFIX = $PREFIX
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EXEC_PREFIX = $EXEC_PREFIX
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BINDIR = $BINDIR
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MANPREFIX = $MANDIR
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CC = $CC
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CFLAGS = $CFLAGS
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LDFLAGS = $LDFLAGS
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CFLAGS_STD = $CFLAGS_STD
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LDFLAGS_STD = $LDFLAGS_STD
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CFLAGS_AUTO = $CFLAGS_AUTO
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LDFLAGS_AUTO = $LDFLAGS_AUTO
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CFLAGS_DEBUG = -U_FORTIFY_SOURCE -UNDEBUG -O0 -g -ggdb -Wall -Wextra -pedantic -Wno-unused-parameter -Wno-sign-compare
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EOF
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exec 1>&3 3>&-
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printf "done\n"
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test "$SRCDIR" = "." || ln -sf $SRCDIR/Makefile .
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