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#!/bin/bash
libs=(luajit sdl2 pangoft2)
CFLAGS+=(-std=c11 -fPIC)
LDFLAGS+=(-shared)
usage () { echo "Usage: $0 [-h|options...]"; }
help () {
cat <<EOF
Options:
-B ldlib Append ldlib to LDLIBS
-C cflag Append cflag to CFLAGS
-L ldflag Append ldflag to LDFLAGS
-P cppflag Append cppflag to CPPFLAGS
-c when Enable compiler colours (always|auto|off) [default: auto]
-d Enable debugging flags
-e Enable -Werror
-h Show this help
-o Enable optimisation flags
-v Print results of configuration
-w Enable warning flags
Environment:
CC C compiler
PKG_CONFIG pkg-config
EOF
}
exists() { command -v "$1" >/dev/null 2>&1; }
check() {
what=$1
shift
for p do
if exists "$p"; then
echo "$p"
return
fi
done
echo "$what not set or found" >&2
return 1
}
CC=$(check '$CC, cc, gcc or clang' "$CC" cc gcc clang) || exit
pc=$(check '$PKG_CONFIG, pkg-config or pkg-conf' "$PKG_CONFIG" pkg-config pkg-conf) || exit
for l in "${libs[@]}"; do
"$pc" --print-errors --exists "$l" || exit
done
CFLAGS+=($("$pc" --cflags-only-other "${libs[@]}"))
CPPFLAGS+=($("$pc" --cflags-only-I "${libs[@]}"))
LDFLAGS+=($("$pc" --libs-only-L --libs-only-other "${libs[@]}"))
LDLIBS+=($("$pc" --libs-only-l "${libs[@]}"))
colour=auto
while getopts B:C:L:P:c:dehovw opt; do
case $opt in
B) LDLIBS+=("$OPTARG");;
C) CFLAGS+=("$OPTARG");;
L) LDFLAGS+=("$OPTARG");;
P) CPPFLAGS+=("$OPTARG");;
c) colour="$OPTARG";;
d)
CFLAGS+=(-Og -g)
LDFLAGS+=(-Og -g)
;;
e) CFLAGS+=(-Werror);;
h) usage; help; exit;;
o)
CFLAGS+=(-O2 -flto)
LDFLAGS+=(-O2 -flto)
;;
v) verbose=1;;
w) CFLAGS+=(-Wall -Wextra);;
?) usage >&2; exit 1;;
esac
done
if [[ $colour == auto && -t 1 ]]; then
colour=always
fi
if [[ $colour == always ]]; then
CFLAGS+=(-fdiagnostics-color)
fi
{
echo "# generated using $0 $@"
echo "CC=$CC"
echo "CFLAGS=(${CFLAGS[@]@Q})"
echo "CPPFLAGS=(${CPPFLAGS[@]@Q})"
echo "LDFLAGS=(${LDFLAGS[@]@Q})"
echo "LDLIBS=(${LDLIBS[@]@Q})"
} >.config.rc
[[ $verbose ]] && cat .config.rc
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