#!/bin/sh
exstat=1
trap 'rm -f Makefile dummy dummy.exe testfunc.c testfunc testfunc.exe; exit $exstat' 0 1 2 3 15
#
# Yet another Apache Configure helper script.
# This script tests certain aspects of the compilation
# process. Right now, it can perform 5 tests:
#
# ./helpers/TestCompile lib <libname>
#    Which checks to see if <libname> exists on this system
#
# ./helpers/TestCompile lib <libname> <func>
#    Which checks to see if <libname> exists on this system and
#    contains func.
#
# ./helpers/TestCompile func <function>
#    Which checks to see if <function> exists
#
# ./helpers/TestCompile header <header>
#    Which checks to see if header file <header> exists
#
# ./helpers/TestCompile sanity
#    Which does a simple sanity check/test compile
#
# ./helpers/TestCompile sizeof <type>
#    Which prints out the sizeof <type> (sure would be nice
#    if sizeof could be use in preprocessor if's)
#
# ./helpers/TestCompile byteorder
#    Which prints out the byte order of the machine
#    (12: little endian, 21: big endian)
#
# It does these by creating a small mini-makefile, based on
# ../Makefile.config and trying to compile a small dummy
# program. If the compilation succeeds, we assume the test
# was successful as well.
#
# This must be run as './helpers/TestCompile' from
# the ./src directory (same directory that Configure is
# located) if you want to test it out. Configure must
# also call it as './helpers/TestCompile'
#
# Initially written by Jim Jagielski for the Apache configuration mechanism
#
# This script falls under the Apache License.
# See http://www.apache.org/docs/LICENSE


cd ./helpers

#
# Handle "verbose", "silent" and "runit" flags
#
VERBOSE=no
RUNIT="no"
case "$1" in
    "-v")
        VERBOSE="yes"
	shift
	;;
    "-s")
        VERBOSE="no"
	shift
	;;
    "-r")
        RUNIT="yes"
	shift
	;;
esac

#
# Make sure have the right arguments
#

case "$1" in
    "lib")
	if [ "x$2" = "x" ]; then
	    exit
	fi
	TLIB="-l$2"
	if [ "x$VERBOSE" = "xyes" ]; then
	    ERRDIR=""
	else
	    ERRDIR='2>/dev/null'
	fi
	if [ "x$3" = "x" ]; then
	    TARGET='dummy'
	else
	    TARGET='testfunc'
	    echo "int main(void) { $3(); return(0); }" > testfunc.c
	fi
	;;
    "sizeof")
	if [ "x$2" = "x" ]; then
	    exit
	fi
	TLIB=""
	if [ "x$VERBOSE" = "xyes" ]; then
	    ERRDIR=""
	else
	    ERRDIR='2>/dev/null'
	fi
	TARGET='testfunc'
	cat <<EOF >testfunc.c
#include <stdio.h>
#include <sys/types.h>
int main(void) {
    printf("%d\n", sizeof($2));
    return(0);
}
EOF
	;;
    "byteorder")
	TLIB=""
	if [ "x$VERBOSE" = "xyes" ]; then
	    ERRDIR=""
	else
	    ERRDIR='2>/dev/null'
	fi
	TARGET='testfunc'
	cat <<EOF >testfunc.c
#include <stdio.h>
#include <sys/types.h>
int main(void) {
    /* Are we little or big endian? From Harbison & Steele */
    union {
        long l;
        char c[sizeof(long)];
    } u;
    u.l = 1;
    printf("%s\n", u.c[sizeof(long)-1] == 1 ? "21" : "12");
    return(0);
}
EOF
	;;
    "sanity")
	TLIB=""
	if [ "x$VERBOSE" = "xno" ]; then
	    ERRDIR='2>/dev/null'
	else
	    ERRDIR=""
	fi
	TARGET='dummy'
	;;
    "func")
	if [ "x$2" = "x" ]; then
	    exit
	fi
	TLIB=""
	if [ "x$VERBOSE" = "xyes" ]; then
	    ERRDIR=""
	else
	    ERRDIR='2>/dev/null'
	fi
	TARGET='testfunc'
	cat <<EOF >testfunc.c
int main(void) {
    $2();
    return(0);
}
EOF
	;;
    "header")
	if [ "x$2" = "x" ]; then
	    exit
	fi
	TLIB=""
	if [ "x$VERBOSE" = "xyes" ]; then
	    ERRDIR=""
	else
	    ERRDIR='2>/dev/null'
	fi
	TARGET='testfunc'
	cat <<EOF >testfunc.c
#include <$2>
int main(void) {
    return(0);
}
EOF
	;;
    *)
    	exit
	;;
esac

#
# Get makefile settings and build a basic Makefile
#
rm -f dummy
cat ../Makefile.config > Makefile
cat <<EOF >> Makefile
CFLAGS=\$(OPTIM) \$(CFLAGS1) \$(EXTRA_CFLAGS)
LIBS=\$(EXTRA_LIBS) \$(LIBS1)
INCLUDES=\$(INCLUDES1) \$(EXTRA_INCLUDES)
LDFLAGS=\$(LDFLAGS1) \$(EXTRA_LDFLAGS)

dummy:
	cd ..; \$(CC) \$(CFLAGS) \$(INCLUDES) \$(LDFLAGS) helpers/dummy.c -o helpers/dummy $TLIB \$(LIBS)

testfunc:
	cd ..; \$(CC) \$(CFLAGS) \$(INCLUDES) \$(LDFLAGS) helpers/testfunc.c -o helpers/testfunc $TLIB \$(LIBS)
EOF

# Now run that Makefile
eval "${MAKE-make} ${TARGET} $ERRDIR >&2"

# And see if dummy exists and is executable, if so, then we
# assume the condition we are testing for is good
#
# Use our PrintPath helper script using the "-p" option to
# have PrintPath just search this directory.

if ./PrintPath -s -p`pwd` $TARGET ; then
    if [ "x$RUNIT" = "xyes" ]; then
	`pwd`/$TARGET
    fi
    exstat=0
fi