marseymoji/third_party/pngquant/configure

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#!/usr/bin/env bash
CONFIG="config.mk"
PREFIX="/usr/local"
VERSION=$(grep "define PNGQUANT_VERSION" pngquant.c | grep -Eo "[12]\.[0-9.]+")
DEBUG=
SSE=auto
OPENMP=
if [[ "$OSTYPE" =~ "darwin" ]]; then
COCOA_READER=auto
LCMS2=0
else
COCOA_READER=0
LCMS2=auto
fi
EXTRA_CFLAGS=
EXTRA_LDFLAGS=
# make gcc default compiler unless CC is already set
CC=${CC:-gcc}
help() {
printf "%4s %s\n" "" "$1"
}
for i in "$@"; do
case $i in
--help)
echo
help "--prefix= installation directory [$PREFIX]"
help "--extra-cflags= append to CFLAGS"
help "--extra-ldflags= append to LDFLAGS"
echo
help "--enable-debug"
help "--enable-sse/--disable-sse enable/disable SSE instructions"
echo
help "--with-openmp compile with multicore support"
help "--with-lcms2/--without-lcms2 compile with color profile support"
if [[ "$OSTYPE" =~ "darwin" ]]; then
help "--with-cocoa/--without-cocoa use Cocoa framework to read images"
fi
echo
help "CC=<compiler> use given compiler command"
help "CFLAGS=<flags> pass options to the compiler"
help "LDFLAGS=<flags> pass options to the linker"
echo
exit 0
;;
# Can be set before or after configure. Latter overrides former.
CC=*)
CC=${i#*=}
;;
CFLAGS=*)
CFLAGS=${i#*=}
;;
LDFLAGS=*)
LDFLAGS=${i#*=}
;;
--enable-debug)
DEBUG=1
;;
--enable-sse)
SSE=1
;;
--disable-sse)
SSE=0
;;
--with-openmp)
OPENMP=1
;;
--with-lcms2)
LCMS2=1
COCOA_READER=0
;;
--without-lcms2)
LCMS2=0
;;
--with-cocoa)
COCOA_READER=1
LCMS2=0
;;
--without-cocoa)
COCOA_READER=0
;;
--prefix=*)
PREFIX=${i#*=}
;;
# can be used multiple times or in quotes to set multiple flags
--extra-cflags=*)
EXTRA_CFLAGS="$EXTRA_CFLAGS ${i#*=}"
;;
--extra-ldflags=*)
EXTRA_LDFLAGS="$EXTRA_LDFLAGS ${i#*=}"
;;
*)
echo "error: unknown switch ${i%%=*} (see $0 --help for the list)"
exit 1
;;
esac
done
# If someone runs sudo make install as very first command, and configure later,
# $CONFIG cannot be overwritten, and must be deleted before continuing.
if [[ -f "$CONFIG" && ! -w "$CONFIG" ]]; then
echo "Cannot overwrite file $CONFIG! Please delete it."
exit 1
fi
cflags() {
CFLAGS="$CFLAGS $1"
}
lflags() {
LDFLAGS="$LDFLAGS $1"
}
status() {
printf "%10s: %s\n" "$1" "$2"
}
# Append to CFLAGS if compiler supports flag, with optional prerequisite.
# Fails on errors and warnings.
conditional_cflags() {
if [ -z "$("$CC" -xc -S -o /dev/null $2 $1 <(echo) 2>&1)" ]; then
cflags "$1"
fi
}
# returns first matching file in directory
find_f() {
echo $(find "$1" -not -type d -name "$2" -print -quit 2> /dev/null)
}
# returns first matching file in directory (no symlinks)
find_h() {
echo $(find "$1" -type f -name "$2" -print -quit 2> /dev/null)
}
find_pkgconfig() {
LIBNAME=$1
if pkg-config --exists "$LIBNAME" &> /dev/null; then
cflags "$(pkg-config --cflags "$LIBNAME")"
lflags "$(pkg-config --libs "$LIBNAME")"
status "$LIBNAME" "shared ($(pkg-config --modversion "$LIBNAME"))"
return 0
fi
return 1
}
find_static() {
LIBNAME=$1
HEADERPATTERN=$2
STATICPATTERN=$3
HPATH=$(find_h . "$HEADERPATTERN")
if [ -n "$HPATH" ]; then
APATH=$(find_f . "$STATICPATTERN")
if [ -n "$APATH" ]; then
cflags "-I${HPATH%/*}"
lflags "${APATH}"
status "$LIBNAME" "static"
return 0
fi
fi
return 1
}
find_library() {
LIBNAME=$1
DYNAMICLIBNAME=$2
HEADERPATTERN=$3
STATICPATTERN=$4
DYNAMICPATTERN=$5
# try static in current directory first
if find_static "$LIBNAME" "$HEADERPATTERN" "$STATICPATTERN"; then
return 0;
fi
# try shared
if find_pkgconfig "$LIBNAME"; then
return 0
fi
for i in "${DIRS[@]}"; do
DIR=($i)
HPATH=$(find_h "${DIR[0]}" "$HEADERPATTERN")
if [ -n "$HPATH" ]; then
SOPATH=$(find_f "${DIR[1]}" "$DYNAMICPATTERN")
if [ -n "$SOPATH" ]; then
cflags "-I${HPATH%/*}"
lflags "-L${SOPATH%/*} -l$DYNAMICLIBNAME"
status "$LIBNAME" "shared ... $SOPATH"
return 0
fi
fi
done
return 1
}
# returns full png.h version string
pngh_string() {
echo "$(grep -m1 "define PNG_LIBPNG_VER_STRING" "$1" | \
grep -Eo '"[^"]+"' | grep -Eo '[^"]+')"
}
# returns major minor version numbers from png.h
pngh_majmin() {
local MAJ=$(grep -m1 "define PNG_LIBPNG_VER_MAJOR" "$1" | grep -Eo "[0-9]+")
local MIN=$(grep -m1 "define PNG_LIBPNG_VER_MINOR" "$1" | grep -Eo "[0-9]+")
echo "${MAJ}${MIN}"
}
error() {
status "$1" "error ... $2"
echo
exit 1
}
echo
# basic check
if ! "$CC" -xc -std=c99 <(echo "int main(){}") -o /dev/null &> /dev/null; then
error "Compiler" "$CC is no C compiler"
fi
status "Compiler" "$CC"
# init flags
CFLAGS=${CFLAGS:--O3 -fno-math-errno -funroll-loops -fomit-frame-pointer -Wall}
cflags "-std=c99 -I."
lflags "-lm lib/libimagequant.a"
# DEBUG
if [ -z "$DEBUG" ]; then
cflags "-DNDEBUG"
status "Debug" "no"
else
cflags "-g"
status "Debug" "yes"
fi
# SSE
if [ "$SSE" = 'auto' ]; then
if [[ "$(uname -m)" =~ (amd|x86_)64 ||
"$(grep -E -m1 "^flags" /proc/cpuinfo)" =~ "sse" ]]; then
SSE=1
fi
fi
if [ "$SSE" -eq 1 ]; then
status "SSE" "yes"
cflags "-DUSE_SSE=1"
cflags "-msse"
# Silence a later ICC warning due to -msse working slightly different.
conditional_cflags "-wd10121"
# Must be set explicitly for GCC on x86_32. Other compilers imply it.
conditional_cflags "-mfpmath=sse" "-msse"
elif [ "$SSE" -eq 0 ]; then
status "SSE" "no"
cflags "-DUSE_SSE=0"
fi
# OpenMP
if [ -n "$OPENMP" ]; then
if [[ "$("$CC" -xc -E -fopenmp <(echo -e \
"#ifdef _OPENMP
#include <omp.h>
#endif") 2>&1)" =~ "omp_get_thread_num" ]]; then
cflags "-fopenmp"
lflags "-fopenmp"
status "OpenMP" "yes"
else
error "OpenMP" "not supported by compiler (please install a compiler that supports OpenMP (e.g. gcc) and specify it with the CC= argument)"
fi
else
# silence warnings about omp pragmas
cflags "-Wno-unknown-pragmas"
conditional_cflags "-wd3180" # ICC
status "OpenMP" "no"
fi
# Cocoa
if [[ "$OSTYPE" =~ "darwin" ]]; then
cflags "-mmacosx-version-min=10.6"
lflags "-mmacosx-version-min=10.6"
if [ "$COCOA_READER" != 0 ]; then
COCOA_READER=1
cflags "-DUSE_COCOA=1"
lflags "-framework Cocoa"
status "Cocoa" "yes"
else
status "Cocoa" "no"
fi
fi
if [[ "$OSTYPE" =~ "darwin" ]]; then
SOLIBSUFFIX=dylib
else
SOLIBSUFFIX=so
fi
# pairs of possible *.h and lib*.so locations
DIRS=("/usr/local/include /usr/local/lib"
"/usr/include /usr/lib")
# libpng
SUCCESS=0
# try static in current directory first
PNGH=$(find_h . "png.h")
if [ -n "$PNGH" ]; then
PNGH_STRING=$(pngh_string "$PNGH")
PNGH_MAJMIN=$(pngh_majmin "$PNGH")
if [[ -n "$PNGH_STRING" && -n "$PNGH_MAJMIN" ]]; then
LIBPNGA=$(find_f . "libpng${PNGH_MAJMIN}.a")
if [ -n "$LIBPNGA" ]; then
cflags "-I${PNGH%/*}"
lflags "${LIBPNGA}"
status "libpng" "static (${PNGH_STRING})"
SUCCESS=1
fi
fi
fi
# try shared
if [ "$SUCCESS" -eq 0 ]; then
if find_pkgconfig libpng; then
SUCCESS=1
else
for i in "${DIRS[@]}"; do
DIR=($i)
PNGH=$(find_h "${DIR[0]}" "png.h")
if [ -n "$PNGH" ]; then
PNGH_STRING=$(pngh_string "$PNGH")
PNGH_MAJMIN=$(pngh_majmin "$PNGH")
if [[ -n "$PNGH_STRING" && -n "$PNGH_MAJMIN" ]]; then
LIBPNGSO=$(find_f "${DIR[1]}" "libpng${PNGH_MAJMIN}.$SOLIBSUFFIX*")
if [ -n "$LIBPNGSO" ]; then
cflags "-I${PNGH%/*}"
lflags "-L${LIBPNGSO%/*} -lpng${PNGH_MAJMIN}"
status "libpng" "shared (${PNGH_STRING})"
SUCCESS=1
break
fi
fi
fi
done
fi
fi
if [ "$SUCCESS" -eq 0 ]; then
if [[ "$OSTYPE" =~ "darwin" ]]; then
LIBPNGCOMMAND='`brew install libpng`'
else
LIBPNGCOMMAND='`apt-get install libpng-dev` or `yum install libpng-devel`'
fi
error "libpng" "not found (try: $LIBPNGCOMMAND)"
fi
# zlib
if ! find_library "zlib" "z" "zlib.h" "libz.a" "libz.$SOLIBSUFFIX*"; then
error "zlib" "not found (please install zlib-devel package)"
fi
# lcms2
if [ "$LCMS2" != 0 ]; then
if find_library "lcms2" "lcms2" "lcms2.h" "liblcms2.a" "liblcms2.$SOLIBSUFFIX*"; then
cflags "-DUSE_LCMS=1"
else
if [ "$LCMS2" = 'auto' ]; then
status "lcms2" "no"
else
error "lcms2" "not found (please install libcms2-devel package)"
fi
fi
else
status "lcms2" "no"
fi
echo
# As of GCC 4.5, 387 fp math is significantly slower in C99 mode without this.
# Note: CPUs without SSE2 use 387 for doubles, even when SSE fp math is set.
conditional_cflags "-fexcess-precision=fast"
# Intel C++ Compiler
# ICC does usually only produce fast(er) code when it can optimize to the full
# capabilites of the (Intel) CPU. This is equivalent to -march=native for GCC.
conditional_cflags "-xHOST"
# Disable unsafe fp optimizations and enforce fp precision as set in the source.
conditional_cflags "-fp-model source"
# Silence a gold linker warning about string misalignment.
conditional_cflags "-falign-stack=maintain-16-byte"
lflags "-lm" # Ubuntu requires this library last, issue #38
if [ -n "$EXTRA_CFLAGS" ]; then
cflags "$EXTRA_CFLAGS"
fi
if [ -n "$EXTRA_LDFLAGS" ]; then
lflags "$EXTRA_LDFLAGS"
fi
# Overwrite previous configuration.
echo "
# auto-generated by configure
PREFIX = $PREFIX
VERSION = $VERSION
CC = $CC
CFLAGS = $CFLAGS
LDFLAGS = $LDFLAGS
COCOA_READER = $COCOA_READER
" > "$CONFIG"
# Configure static library the same way
cp "$CONFIG" lib/