configure

#!/bin/bash
#
# Copyright (C) Niklaus F.Schen.
#

#  test system type
sysname=`uname -s`
debug=0
path=/usr/bin/
libpath=/usr/local/melon
cc="cc"
echo -e "#include <stdio.h>\nint main(void) {printf(\"1\");return 0;}" > .xcode.c
$cc -o .xcode .xcode.c 2>/dev/null 1>&2
if [ $? -ne 0 ]; then
    cc="$cc -isysroot `xcrun --show-sdk-path`"
fi
rm -fr .xcode .xcode.c

#installation path
if ! case $sysname in MINGW*) false;; esac; then
    echo "No support Windows"
    exit 1
fi

#get all parameters
for param in $@
do
    if [ $param == "--help" ]; then
        echo -e "\nMelon platform."
        echo "Copyright (C) Niklaus F.Schen."
        echo "Options:"
        echo -e "\t--prefix=INSTALL_PATH"
        echo -e "\t--melon-prefix=INSTALLED_MELON_PATH"
        echo -e "\t--cc=C compiler"
        echo -e "\t--debug"
        exit 0
    fi
    param_prefix=`echo $param|cut -d '=' -f 1`
    param_suffix=`echo $param|cut -d '=' -f 2`
    if [ $param_prefix == "--prefix" ]; then
        path=$param_suffix
    elif [ $param_prefix == "--melon-prefix" ]; then
        libpath=$param_suffix
    elif [ $param_prefix == "--debug" ]; then
        debug=1
    elif [ $param_prefix == "--cc" ]; then
        cc=$param_suffix
    fi
done

#debug
if [ $debug -ne 0 ]; then
    debug='-ggdb -D__DEBUG__'
else
    debug=''
fi

#  build makefile content
echo "# " > Makefile
echo "# Copyright (C) Niklaus F.Schen." >> Makefile
echo "# " >> Makefile
echo -e "CC\t\t= $cc" >> Makefile

gccver=`gcc -dumpversion|cut -d '.' -f 1`
if [ $sysname != 'Darwin' -a "$?" == "0" -a $gccver -ge 11 ]; then
    echo -e "FLAGS\t\t= -I$libpath/include -c -Wall $debug -Werror -O2 -fPIC -Iinclude" >> Makefile
else
    echo -e "FLAGS\t\t= -I$libpath/include -c -Wall $debug -Werror -O3 -fPIC -Iinclude" >> Makefile
fi

echo -e "MEDGE\t\t= medge" >> Makefile

echo -e "OBJS\t\t= \\" >> Makefile
for f in `find src -name "*.c"`
do
    prefix=`echo $f|cut -d '/' -f 2 | cut -d '.' -f 1`
    echo -e "\tobjs/$prefix.o \\" >> Makefile
done
echo -e "\n" >> Makefile

echo -e ".PHONY :\tcompile install clean" >> Makefile

echo "compile: MKDIR \$(OBJS) \$(MEDGE)" >> Makefile

echo "clean:" >> Makefile
echo -e "\trm -fr objs bin Makefile" >> Makefile

echo "MKDIR :" >> Makefile
echo -e "\ttest -d objs || mkdir objs" >> Makefile
echo -e "\ttest -d bin || mkdir bin" >> Makefile

echo "\$(MEDGE) : \$(OBJS)" >> Makefile
echo -e "\t\$(CC) -o bin/\$(MEDGE) \$(OBJS) $debug -Wall -Werror -L$libpath/lib -lmelon -I$libpath/include" >> Makefile

echo "install:" >> Makefile
echo -e "\ttest -d $path || mkdir -p $path" >> Makefile
echo -e "\ttest -d /opt/medge || mkdir -p /opt/medge && cp example/* /opt/medge/" >> Makefile
echo -e "\tcp -fr bin/medge $path/" >> Makefile

for fname in `find . -name "*.c"`
do
    objname=`basename $fname | cut -d '.' -f 1`".o"
    echo -n "objs/$objname :" >> Makefile
    for header in `cpp -MM -MG $fname 2> /dev/null`
    do
        suffix=`echo $header | cut -d '.' -f 2`
        if [ $suffix = 'c' ]; then
            echo -n $header >> Makefile
            echo -n " " >> Makefile
            continue
        fi
        if [ $suffix != 'h' ]; then
            continue
        fi
        test -e include/$header && echo -n "include/$header " >> Makefile
    done
    echo "" >> Makefile

    echo -e "\t\$(CC) \$(FLAGS) -o \$@ $fname" >> Makefile
done

echo "Configure done!"