path: root/configure

#!/bin/sh
# Configure script by blankhex

# Global variables
source_path=""
cc=$CC
ar=$AR
enable_dynamic="no"
enable_mt="no"
enable_lfs="no"
enable_tests="no"
use_clock_gettime="no"

if [ -z "$cc" ]; then cc=gcc; fi
if [ -z "$ld" ]; then ld=gcc; fi
if [ -z "$ar" ]; then ar=ar; fi

# Internal functions
assign_option() {
    set -- ${1#--} $2
    set -- ${2:-${1%%=*}} ${1#*=}
    eval "$1=$2"
}

assign_toggle() {
    set -- ${1#--} $2 $3
    set -- ${2:-${1%%=*}} ${1#*=} $3 $1
    if test $4 = $2; then set -- $1 $3; fi
    eval "$1=$2"
}

# Option parsing
for option do
    case $option in
        --cc=*) assign_option "$option"; ;;
        --ar=*) assign_option "$option"; ;;
        --extra-cflags=*) assign_option "$option" extra_cflags; ;;
        --extra-ldflags=*) assign_option "$option" extra_ldflags; ;;
        --platform=*) assign_option "$option"; ;;
        --enable-dynamic|--enable-dynamic=*) assign_toggle "$option" enable_dynamic yes; ;;
        --enable-mt|--enable-mt=*) assign_toggle "$option" enable_mt yes; ;;
        --enable-lfs|--enable-lfs=*) assign_toggle "$option" enable_lfs yes; ;;
        --enable-tests|--enable-tests=*) assign_toggle "$option" enable_tests yes; ;;
        --use-clock_gettime|--use-clock_gettime=*) assign_toggle "$option" use_clock_gettime yes; ;;
        --source-path=*) assign_option "$option" source_path; ;;
        --help|-h) display_help="yes"; ;;
        *) echo "configure: WARNING: unrecognized option $option"; ;;
    esac
done

# Help message
show_help() {
cat << EOF
Usage: configure [OPTIONS]

Options:
  --help                            Print this message
  --source-path=                    Path to the source code
  --cc=CC                           C compiler
  --ar=AR                           Library archiver
  --extra-cflags=                   Extra compiler flags
  --extra-ldflags=                  Extra linker flags
  --platform=[Posix|Win32|Dummy]    Specify target platform
  --enable-dynamic[=yes|no]         Make dynamic library
  --enable-mt[=yes|no]              Enable multithreading support
  --enable-lfs[=yes|no]             Enable large file support
  --enable-tests[=yes|no]           Enable unit tests
  --use-clock_gettime[=yes|no]      Use of clock_gettime regardless of the support
EOF
exit 1
}

if [ -n "$display_help" ]; then show_help; fi

# Detect OS and platform, because it wasn't specified
os="Unknown"
if [ -z "$platform" ]; then 
    case $(uname) in
        Darwin) os="MacOS"; platform="Posix"; ;;
        Linux) os="Linux"; platform="Posix"; ;;
        *BSD) os="BSD"; platform="Posix"; ;;
        CYGWIN*|MINGW*|MSYS*) os="Windows"; platform="Win32"; ;;
        *) os="Unknown"; platform="Dummy"; ;;
    esac
fi

# Validate platforms
case $platform in
    Posix) ;;
    Win32) ;;
    Dummy) ;;
    *) echo "configure: WARNING: unrecognized platform $platform"; platform=Dummy; ;;
esac

# Make build magic
cflags="-fPIC -I${source_path}include -I."
ldflags="-lm -shared"
cflags="$cflags $extra_cflags"
ldflags="$ldflags $extra_ldflags"

echo "OS:                       $os"
echo "Platform:                 $platform"
echo "Source path:              $source_path"
echo "CC:                       $cc"
echo "AR:                       $ar"
echo "CFLAGS:                   $cflags"
echo "LDFLAGS:                  $ldflags"
echo "Enable multithreading:    $enable_mt"
echo "Enable long file support: $enable_lfs"
echo "Enable tests:             $enable_tests"
echo "Build dynamic library:    $enable_dynamic"
echo "Use clock_gettime:        $use_clock_gettime"

# Make sure that build directories exist
mkdir src src/Platform src/Math src/String 2> /dev/null

# Build source list
sources="${source_path}src/Platform/Spinlock.c"

# Platform dependant sources
if [ "$platform" = "Posix" ]; then
    exe=""
    sources="$sources:${source_path}src/Platform/Posix/File.c"
    mkdir src/Platform/Posix 2> /dev/null
elif [ "$platform" = "Win32" ]; then
    exe=".exe"
    sources="$sources:${source_path}src/Platform/Win32/File.c"
    mkdir src/Platform/Win32 2> /dev/null
else
    exe=""
    sources="$sources:${source_path}src/Platform/Dummy/File.c"
    mkdir src/Platform/Dummy 2> /dev/null
fi

if [ "$platform" = "Posix" ] && [ "$enable_mt" = "yes" ]; then
    sources="$sources:${source_path}src/Platform/Posix/Condition.c"
    sources="$sources:${source_path}src/Platform/Posix/Mutex.c"
    sources="$sources:${source_path}src/Platform/Posix/Semaphore.c"
    sources="$sources:${source_path}src/Platform/Posix/Thread.c"
    sources="$sources:${source_path}src/Platform/Posix/Tss.c"
    mkdir src/Platform/Posix 2> /dev/null
elif [ "$platform" = "Win32" ] && [ "$enable_mt" = "yes" ]; then
    sources="$sources:${source_path}src/Platform/Win32/Condition.c"
    sources="$sources:${source_path}src/Platform/Win32/Mutex.c"
    sources="$sources:${source_path}src/Platform/Win32/Semaphore.c"
    sources="$sources:${source_path}src/Platform/Win32/Thread.c"
    sources="$sources:${source_path}src/Platform/Win32/Tss.c"
    mkdir src/Platform/Win32 2> /dev/null
else
    sources="$sources:${source_path}src/Platform/Dummy/Condition.c"
    sources="$sources:${source_path}src/Platform/Dummy/Mutex.c"
    sources="$sources:${source_path}src/Platform/Dummy/Semaphore.c"
    sources="$sources:${source_path}src/Platform/Dummy/Thread.c"
    sources="$sources:${source_path}src/Platform/Dummy/Tss.c"
    mkdir src/Platform/Dummy 2> /dev/null
fi

# Platform independant sources
for file in ${source_path}src/*.c; do
    sources="$sources:$file"
done

for file in ${source_path}src/Math/*.c; do
    sources="$sources:$file"
done

for file in ${source_path}src/String/*.c; do
    sources="$sources:$file"
done

# Tests
if [ "$enable_tests" = "yes" ]; then
    tests=""
    mkdir test test/src 2> /dev/null
    for file in "${source_path}test/src/*.c"; do
        if [ -n "$tests" ]; then tests="$tests:$file"
        else tests="$file"; fi
    done
fi

# Generate variables
echo "CC=$cc" > Makefile
echo "CFLAGS=$cflags" >> Makefile
echo "LDFLAGS=$ldflags" >> Makefile
echo "STATICLIB=libbh.a" >> Makefile

if [ "$enable_dynamic" = "yes" ]; then
    echo "DYNAMICLIB=libbh.so" >> Makefile
fi

# Set a list of objects
printf "OBJS=" >> Makefile
(
    IFS=":"
    for source in $sources; do
        object=${source%%.c}.o
        object=${object#${source_path}}
        echo " \\" >> Makefile 
        printf "  %s" "$object" >> Makefile 
    done
)
printf "\n\n" >> Makefile

# Check if dynamic linking is enabled and add rules
if [ "$enable_dynamic" = "yes" ]; then
    printf "all: static dynamic\n\n" >> Makefile
    printf "dynamic: \$(DYNAMICLIB)\n\n" >> Makefile
    printf "\$(DYNAMICLIB): \$(OBJS)\n" >> Makefile
    printf "\t\$(CC) \$(LDFLAGS) \$(OBJS) -o \$(DYNAMICLIB)\n\n" >> Makefile
else
    printf "all: static\n\n" >> Makefile
fi

# Add rules for static linking
printf "static: \$(STATICLIB)\n\n" >> Makefile
printf "\$(STATICLIB): \$(OBJS)\n" >> Makefile
printf "\t\$(AR) r \$(STATICLIB) \$(OBJS)\n\n" >> Makefile

# Generate rules for tests
if [ "$enable_tests" = "yes" ]; then
(
    IFS=":"
    for source in $tests; do
        object=${source%%.c}${exe}
        object=${object#${source_path}}
        printf "%s: %s \$(STATICLIB)\n" $object $source >> Makefile
        printf "\t\$(CC) \$(CFLAGS) -I${source_path}unit/include %s %s \$(STATICLIB) -o %s\n\n" "$source" "${source_path}unit/src/Unit.c" "$object" >> Makefile
    done
)

printf "tests: " >> Makefile
(
    IFS=":"
    for source in $tests; do
        object=${source%%.c}${exe}
        object=${object#${source_path}}
        echo " \\" >> Makefile 
        printf "  %s" "$object" >> Makefile 
    done
)
printf "\n\n" >> Makefile
fi

# Generate rules for main objects
(
    IFS=":"
    for source in $sources; do
        object=${source%%.c}.o
        object=${object#${source_path}}
        printf "$object: $source\n" >> Makefile 
        printf "\t\$(CC) -c \$(CFLAGS) \$< -o \$@\n\n" >> Makefile
    done
)
printf "\n\n" >> Makefile

# Generate clean rules
printf "clean:\n" >> Makefile
printf "\t-rm -f \$(OBJS) \$(STATICLIB)" >> Makefile
if [ "$enable_dynamic" = "yes" ]; then
    printf " \$(DYNAMICLIB)" >> Makefile
fi

if [ "$enable_tests" = "yes" ]; then
(
    IFS=":"
    for source in $tests; do
        object=${source%%.c}${exe}
        object=${object#${source_path}}
        printf " %s" "$object" >> Makefile 
    done
)
fi
printf "\n\n" >> Makefile

# Generate internal config.h
printf "#ifndef BH_SRC_CONFIG_H\n#define BH_SRC_CONFIG_H\n\n" > Config.h
if [ "$use_clock_gettime" ]; then printf "#define BH_USE_CLOCK_GETTIME\n" >> Config.h; fi
if [ "$enable_lfs" ]; then printf "#define BH_ENABLE_LFS\n" >> Config.h; fi
printf "\n#endif /* BH_SRC_CONFIG_H */\n" >> Config.h