145 lines
2.6 KiB
Bash
Executable file
145 lines
2.6 KiB
Bash
Executable file
#!/usr/bin/env sh
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# simple and flexible configure script for people who don't like to waste time
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# licensed to the public domain
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set -e
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mkf=config.mk
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objs='esvapi.o util.o initial.o'
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srcs='esvapi.d util.d initial.d'
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# utility functions
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present () {
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command -v "$1" 1>/dev/null 2>/dev/null
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}
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throw () {
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>&2 printf "%s: %s\n" "$(basename "$0")" "$1"
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exit 1
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}
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using () {
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>&2 printf "using %s\n" "$1"
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}
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# generators
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## D compiler
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gen_DC () {
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if [ -n "$dc" ]; then
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using "$dc"
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return 0
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fi
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if present ldc2; then
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dc=ldc2
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elif present dmd; then
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dc=dmd
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else
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throw "D compiler not found; install LDC or DMD"
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fi
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using "$dc"
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}
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## flags used in the compilation step
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gen_CFLAGS () {
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if [ -z "$debug" ]; then
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case "$dc" in
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ldc2) cflags="-Oz";;
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dmd) cflags="-O";;
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esac
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else
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cflags="-g"
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case "$dc" in
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ldc2) cflags="$cflags -O0 -d-debug";;
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dmd) cflags="$cflags -debug";;
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esac
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fi
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for flag in $cflags; do
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using "$flag"
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done
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}
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## flags used in the linking step
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gen_LDFLAGS () {
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if [ "$dc" = ldc2 ]; then
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if present ld.lld; then
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ldflags="-linker=lld"
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elif present ld.gold; then
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ldflags="-linker=gold"
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fi
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fi
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if [ -z "$debug" ]; then
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if [ -n "$ldflags" ]; then ldflags="$ldflags "; fi
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ldflags="$ldflags-L--gc-sections"
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fi
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for flag in $ldflags; do
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using "$flag"
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done
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}
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# command line interface
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while getopts c:dhr ch; do
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case "$ch" in
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c)
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case "$OPTARG" in
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ldc2) dc="ldc2" ;;
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dmd) dc="dmd" ;;
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*) throw "unknown D compiler '$OPTARG' specified (valid options: ldc2, dmd)" ;;
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esac
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;;
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d) debug=1 ;;
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r) unset debug ;;
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h)
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cat <<EOF
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configure: create an optimised makefile for the current environment
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options:
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-c: force use of a particular compiler (dmd or ldc2)
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-d: build in debug mode, with debug symbols and statements enabled
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-r: build in release mode with optimisation flags enabled (default)
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-h: show this help message
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EOF
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exit 0
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;;
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'?') exit 1 ;;
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:) exit 1 ;;
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esac
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done
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# creating the makefile
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gen_DC
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gen_CFLAGS
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gen_LDFLAGS
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rm -f "$mkf"
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{
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printf '# begin generated definitions
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_DC = %s
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_CFLAGS = %s
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_LDFLAGS = %s
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' "$dc" "$cflags" "$ldflags"
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## generate obj list
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printf '_OBJS ='
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for obj in $objs; do
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printf ' %s' "$obj"
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done
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printf '\n# end generated definitions\n'
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## generate dependency list
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printf '\n# begin generated dependencies\n'
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i=1
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for obj in $objs; do
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src="$(printf '%s' "$srcs" | awk '{print $'"$i"'}')"
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[ -t 2 ] && printf ' (MK) %s \r' "$src" 1>&2
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"$dc" -o- -makedeps "$src"
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i="$((i + 1))"
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done
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unset i
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printf '# end generated dependencies\n'
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} >>"$mkf"
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