configure

#! /bin/bash
#
# This file is free software, distributed under the MIT License.
######################################################################
#### Project Configuration ###########################################
######################################################################

PKG_NAME="ustl"
PKG_VERSTR="v1.6"

PKG_BUGREPORT="Mike Sharov <msharov@users.sourceforge.net>"

# Files that get created by this script
FILES="Config.mk config.h"

# Package options
COMPONENTS='
{
name=[without-shared]
desc=[do not build the shared library]
seds=[s/^\(BUILD_SHARED\)/#\1/]
}{
name=[with-static]
desc=[	build the static library]
seds=[s/^#\(BUILD_STATIC\)/\1/;s/-fPIC/-fPIC -ffunction-sections -fdata-sections/;s/-gc-sections/-gc-sections -static-libgcc/]
}{
name=[with-debug]
desc=[	compile for debugging]
seds=[s/^#\(DEBUG\)/\1/]
}{
name=[with-demangler]
desc=[demangle C++ symbols in backtrace]
seds=[s/#undef \(WANT_NAME_DEMANGLING\)/#define \1 1/]
}{
name=[without-bounds]
desc=[disable runtime bounds checking on stream reads/writes]
seds=[s/#define \(WANT_STREAM_BOUNDS_CHECKING\) 1/#undef \1/]
}{
name=[without-fastcopy]
desc=[disable specializations for copy/fill]
seds=[s/#define \(WANT_UNROLLED_COPY\) 1/#undef \1/]
}{
name=[without-mmx]
desc=[	disable use of MMX/SSE/3dNow! instructions]
seds=[s/#define \(WANT_MMX\) 1/#undef \1/]
}{
name=[force-inline]
desc=[make inline keyword mean always inline, not just a hint]
seds=[s/#undef \(WANT_ALWAYS_INLINE\)/#define \1 1/]
}{
name=[with-libstdc++]
desc=[link with libstdc++]
seds=[s/#define \(WITHOUT_LIBSTDCPP\) 1/#undef \1/;s/\(NOLIBSTDCPP\)/#\1/]
}';

# Header files
HEADERS="assert.h ctype.h errno.h fcntl.h float.h inttypes.h limits.h stdio.h
locale.h alloca.h signal.h stdarg.h stddef.h sys/stat.h sys/types.h stdint.h
stdlib.h string.h time.h unistd.h math.h stdlib.h sys/mman.h execinfo.h";

# Libraries
LIBS="supc++ gcc_eh SystemStubs"

# First pair is used if nothing matches
PROGS="CC=gcc CC=clang CC=cc CXX=g++ CXX=clang++ CXX=c++ DOXYGEN=doxygen LD=ld AR=ar RANLIB=ranlib RANLIB=touch INSTALL=install"

# Environment variables
ENVIRONS="CXXFLAGS LDFLAGS"

# Automatic vars
[ -d .git ] && PKG_VERSTR=`git describe --always`
PKG_MAJOR=`expr "$PKG_VERSTR" : 'v\([0-9]*\)\.[0-9]*'`
PKG_MINOR=`expr "$PKG_VERSTR" : 'v[0-9]*\.\([0-9]*\)'`
PKG_STRING="$PKG_NAME $PKG_VERSTR"

# Miscellaneous substitutions
CUSTSUBS="s/@PKG_NAME@/$PKG_NAME/g
s/@PKG_VERSION@/"0x$PKG_MAJOR${PKG_MINOR}0"/g
s/@PKG_VERSTR@/$PKG_VERSTR/g
s/@PKG_TARNAME@/$PKG_NAME/g
s/@PKG_STRING@/$PKG_STRING/g
s/@PKG_UNAME@/`echo $PKG_NAME|tr a-z A-Z`/g
s/@PKG_BUGREPORT@/$PKG_BUGREPORT/g
s/@PKG_MAJOR@/$PKG_MAJOR/g
s/@PKG_MINOR@/$PKG_MINOR/g"

######################################################################
#### The rest of the file is configuration code. Leave it alone. #####
######################################################################

die() { rm -f config.sed config.cpu config.cpu.c; exit; }

#### Compile the configurator and generate initial config.sed ########

if [ -z "$CC" ]; then
    for i in gcc g++ cc c++ c89 c99; do
	CC=`which $i 2>/dev/null` && break
    done
fi
[ -z "$CC" ] && "No C compiler found" && die

# Determine gcc private directory
PSTDDEF=`echo "#include <stddef.h>"|$CC -E -|grep stddef.h|head -n1|cut -d' ' -f3|cut -d'"' -f2`
PINCDIR=`dirname $PSTDDEF`
PLIBDIR=`dirname $PINCDIR`
if [ -d $PLIBDIR/lib ]; then PLIBDIR=$PLIBDIR/lib; fi

# Create and build the C configurator
cat>config.cpu.c<<\SRC
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>

#if defined(__GNUC__) && (__i386__ || __x86_64) && !defined(__PIC__)
static uint cpuid_supported (void)
{
    unsigned long forig, fnew;
    asm ("pushf\n\tpop\t%0\n\t"
	"mov\t%0, %1\n\txor\t$0x200000, %0\n\t"
	"push\t%0\n\tpopf\n\tpushf\n\tpop\t%0"
	: "=r"(fnew), "=r"(forig));
    return (fnew != forig);
}

static uint cpuid (void)
{
    #define i_cpuid(a,r,c,d)	asm("cpuid":"=a"(r),"=c"(c),"=d"(d):"0"(a):"ebx")
    const uint amdBits = 0xC9480000, extFeatures = 0x80000000, amdExtensions = 0x80000001;
    uint r, c, d, caps;
    if (!cpuid_supported()) return (0);
    i_cpuid (0, r, c, d);
    if (!r) return (0);
    i_cpuid (1, r, c, d);
    caps = (d & ~amdBits);
    i_cpuid (extFeatures, r, c, d);
    if (r != extFeatures) {
	i_cpuid (amdExtensions, r, c, d);
	caps |= d & amdBits;
    }
    return (caps);
}
#else
static uint cpuid (void) { return (0); }
#endif
#define SET(c,v) "s/#undef \\(" #c "\\)/#define \\1 " #v "/g\n"

int main (void)
{
    typedef struct { char bit, name[11]; } SCpuCaps;
    static const short int boCheck=0x0001;
    static const char boNames[2][16]={"BIG","LITTLE"};
    static const SCpuCaps s_CpuCaps[]={
	{  0, "FPU"		},
	{  2, "EXT_DEBUG"	},
	{  4, "TIMESTAMPC"	},
	{  5, "MSR"		},
	{  8, "CMPXCHG8"	},
	{  9, "APIC"		},
	{ 11, "SYSCALL"		},
	{ 12, "MTRR"		},
	{ 15, "CMOV"		},
	{ 16, "FCMOV"		},
	{ 22, "SSE "		},
	{ 23, "MMX"		},
	{ 24, "FXSAVE"		},
	{ 25, "SSE "		},
	{ 26, "SSE2"		},
	{ 30, "EXT_3DNOW"	},
	{ 31, "3DNOW"		}
    };
    uint i, caps;

    printf ("s/ \\?@INLINE_OPTS@/");
#if __GNUC__ >= 3
    #if __clang__
    #elif __GNUC__ >= 4
	printf (" -fvisibility-inlines-hidden -fno-threadsafe-statics -fno-enforce-eh-specs");
    #elif __GNUC_MINOR__ >= 4
	printf (" --param max-inline-insns-single=1024"
		" \\\\\\n\\t\\t--param large-function-growth=65535"
		" \\\\\\n\\t\\t--param inline-unit-growth=1024");
    #else
	printf (" -finline-limit=65535");
    #endif
#else
    printf ("/g\ns/-Wredundant-decls/-Wno-redundant-decls");
#endif
    printf ("/g\n");
#if __GNUC__ != 3
    printf ("s/ \\?@libgcc_eh@//g\n");
#endif
#if __i386__
    printf ("s/ \\?-fPIC//g\n");
#endif
#if defined(__GNUC__) || defined(__GLIBC_HAVE_LONG_LONG)
    printf (SET(HAVE_LONG_LONG,1) SET(SIZE_OF_LONG_LONG,%zd), sizeof(long long));
#endif
#if defined(__GNUC__) || (__WORDSIZE == 64) || defined(__ia64__)
#ifndef BSD
    printf (SET(HAVE_INT64_T,1));
#endif
#endif
#ifndef __APPLE__
    if (sizeof(size_t) == sizeof(unsigned long) && sizeof(size_t) != sizeof(uint))
#endif
	printf (SET(SIZE_T_IS_LONG,1));
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
    printf (SET(HAVE_VECTOR_EXTENSIONS,1));
#else
    printf ("s/ \\?-Wshadow//g\n");
#endif
    printf ("s/@BYTE_ORDER@/%s_ENDIAN/g\n"
	SET(RETSIGTYPE,void)
	"s/#undef const/\\/\\* #define const \\*\\//g\n"
	"s/#undef inline/\\/\\* #define inline __inline \\*\\//g\n"
	"s/#undef off_t/\\/\\* typedef long off_t; \\*\\//g\n"
	"s/#undef size_t/\\/\\* typedef long size_t; \\*\\//g\n"
	SET(SIZE_OF_CHAR,%zd)
	SET(SIZE_OF_SHORT,%zd)
	SET(SIZE_OF_INT,%zd)
	SET(SIZE_OF_LONG,%zd)
	SET(SIZE_OF_POINTER,%zd)
	SET(SIZE_OF_SIZE_T,%zd)
	SET(LSTAT_FOLLOWS_SLASHED_SYMLINK,1),
	boNames [(uint)(*((const char*)&boCheck))], sizeof(char),
	sizeof(short), sizeof(int), sizeof(long), sizeof(void*), sizeof(size_t));

    caps = cpuid();
    for (i = 0; i < sizeof(s_CpuCaps)/sizeof(SCpuCaps); ++i)
	if (caps & (1 << s_CpuCaps[i].bit))
	    printf (SET(CPU_HAS_%s,1), s_CpuCaps[i].name);
#if __GNUC__ >= 3
    printf ("s/ \\?@PROCESSOR_OPTS@/");
    #if (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 2)) || (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
	printf (" -std=c++11 -march=native");
    #else
	if (caps & (1<<23))		printf (" -mmmx");
	if (caps & ((1<<22)|(1<<25)))	printf (" -msse -mfpmath=sse");
	if (caps & (1<<26))		printf (" -msse2");
	if (caps & ((1<<30)|(1<<31)))	printf (" -m3dnow");
    #endif
    printf ("/g\n");
#else
    printf ("s/ \\?@PROCESSOR_OPTS@//g\n");
#endif
    return (0);
}
SRC
$CC -o config.cpu config.cpu.c
[ ! -x config.cpu ] && echo "Configurator build failed" && die
./config.cpu > config.sed

#### Set host-dependent options ######################################

SYSNAME=`uname|tr A-Z a-z`
[ "`uname -m|tr A-Z a-z`" = "alpha" ] && SYSNAME="alpha"
case "$SYSNAME" in
    *solaris*| *sun*)	SYSNAME="sun";;
    *darwin*| *osx*)	SYSNAME="mac";;
    *alpha*)		SYSNAME="alpha";;
    *bsd*)		SYSNAME="bsd";;
    *)			SYSNAME="linux";;
esac

if [ "$SYSNAME" = "sun" ]; then
    echo "s/-Wredundant-decls/-Wno-redundant-decls/g
	s/@SHBLDFL@/-G/g" >>config.sed
else
    echo 's/#undef \(HAVE_THREE_CHAR_TYPES\)/#define \1 1/g' >>config.sed
fi
if [ "$SYSNAME" = "bsd" ]; then
    echo 's/ \?@libgcc_eh@//g
	s/#define WITHOUT_LIBSTDCPP 1/#undef WITHOUT_LIBSTDCPP/g
	s/NOLIBSTDCPP	= -nodefaultlibs /#NOLIBSTDCPP	= -nodefaultlibs/g
	s/-Wredundant-decls/-Wno-redundant-decls/g
	s/-Winline/-Wno-inline/g
	s/#define HAVE_VA_COPY 1/#undef HAVE_VA_COPY/g' >>config.sed
fi
if [ "$SYSNAME" = "linux" -o "$SYSNAME" = "bsd" ]; then
    echo 's/@SHBLDFL@/-shared -Wl,-soname=$1/g' >>config.sed
elif [ "$SYSNAME" = "alpha" ]; then
    echo "s/BUILD_SHARED	= 1 /#BUILD_SHARED	= 1/g
	s/#BUILD_STATIC	= 1/BUILD_STATIC	= 1 /g" >>config.sed
fi
if [ "$SYSNAME" = "mac" ]; then
    echo 's/ \?@libgcc_eh@//g
	s/@SYSWARNS@/-Wno-long-double/g
	s/lib$1.so/lib$1.dylib/g
	s/lib$1.so.${MAJOR}.${MINOR}.${BUILD}/lib$1.${MAJOR}.${MINOR}.${BUILD}.dylib/g
	s/lib$1.so.${MAJOR}.${MINOR}/lib$1.${MAJOR}.${MINOR}.dylib/g
	s/lib$1.so.${MAJOR}/lib$1.${MAJOR}.dylib/g
	s/@SHBLDFL@/-Wl,-single_module -compatibility_version 1 -current_version 1 -install_name $1 -Wl,-Y,1455 -dynamiclib -mmacosx-version-min=10.4/g' >>config.sed
else
    echo 's/ \?@SYSWARNS@//g' >>config.sed
fi
if [ "$SYSNAME" = "alpha" -o "$SYSNAME" = "mac" ]; then
    echo 's/#undef \(SIZE_OF_BOOL\)/#define \1 SIZE_OF_LONG/g' >>config.sed
else
    echo 's/#undef \(SIZE_OF_BOOL\)/#define \1 SIZE_OF_CHAR/g' >>config.sed
fi
if [ "$SYSNAME" = "linux" ]; then
    echo 's/#undef \(HAVE_RINTF\)/#define \1 1/g' >>config.sed
else
    echo 's/ \?-mfpmath=sse//g' >>config.sed
fi
if [ "$SYSNAME" = "mac" -o "$SYSNAME" = "bsd" ]; then
    echo 's/#define \(HAVE_STRSIGNAL\) 1/#undef \1/g' >>config.sed
fi

#### Printing helper functions #######################################

PrintComponents() {
    local cc name desc
    cc=$COMPONENTS
    echo "Options:"
    while [ ! -z "$cc" ]; do
	name=`expr "$cc" : '[^}]*name=\[\([^]]*\)\]'`
	desc=`expr "$cc" : '[^}]*desc=\[\([^]]*\)\]'`
	echo "  --$name	$desc"
	cc=`expr "$cc" : '[^}]*}\(.*\)'`
    done
    echo
}

PrintHelp() {
    echo "This program configures $PKG_STRING to adapt to many kinds of systems.

Usage: configure [OPTION]...

Configuration:
  -h, --help		display this help and exit
  -V, --version		display version information and exit

Installation directories:
  --prefix=PREFIX	architecture-independent files [/usr/local]
  --exec-prefix=EPREFIX	architecture-dependent files [PREFIX]
  --bindir=DIR		user executables [EPREFIX/bin]
  --sbindir=DIR		system admin executables [EPREFIX/sbin]
  --libexecdir=DIR	program executables [EPREFIX/libexec]
  --datadir=DIR		read-only architecture-independent data [PREFIX/share]
  --sysconfdir=DIR	read-only single-machine data [PREFIX/etc]
  --sharedstatedir=DIR	modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR	modifiable single-machine data [PREFIX/var]
  --libdir=DIR		object code libraries [EPREFIX/lib]
  --includedir=DIR	C header files [PREFIX/include]
  --oldincludedir=DIR	C header files for non-gcc [/usr/include]
  --gccincludedir=DIR	GCC internal header files [PREFIX/include]
  --infodir=DIR		info documentation [PREFIX/info]
  --mandir=DIR		man documentation [PREFIX/man]

System types:
  --build=BUILD		configure for building on BUILD [guessed]
  --host=HOST		cross-compile to build programs to run on HOST [BUILD]
"
    PrintComponents
    echo "Report bugs to $PKG_BUGREPORT."
}

PrintVersion() {
    echo "$PKG_NAME configure $PKG_VERSTR"
}

SubVar() {
    local esc2
    esc2=`echo $2 | sed 's/\//\\\&/g'`
    eval ac_var_$1='$esc2';
    echo "s/@$1@/$esc2/g" >>config.sed
}

SubComp() {
    local cc name seds
    cc=$COMPONENTS
    while [ ! -z "$cc" ]; do
	name=`expr "$cc" : '[^}]*name=\[\([^]]*\)\]'`
	seds=`expr "$cc" : '[^}]*seds=\[\([^]]*\)\]'`
	[ "$name" = "$1" ] && echo $seds >>config.sed
	cc=`expr "$cc" : '[^}]*}\(.*\)'`
    done
}

for i in $*; do
    case $i in
	--)		break;;
	--version |-V)	PrintVersion && die;;
	--help |-h |-?)	PrintHelp && die;;
	--*=*)		SubVar `expr "$i" : '--\([^=]*\)='` `expr "$i" : '[^=]*=\(.*\)'`;;
	--*)		SubComp `expr "$i" : '--\(.*\)'`;;
	*)		echo "Error: unrecognized option \"$i\"" && die;;
    esac
done

#### Set directory prefixes ##########################################

echo "s/@prefix@/${ac_var_prefix:=\/usr\/local}/g
s/@exec_prefix@/${ac_var_exec_prefix:=$ac_var_prefix}/g
s/@bindir@/$ac_var_exec_prefix\/bin/g
s/@sbindir@/$ac_var_exec_prefix\/sbin/g
s/@libexecdir@/$ac_var_exec_prefix\/libexec/g
s/@datarootdir@/${ac_var_datarootdir:=$ac_var_prefix\/share}/g
s/@datadir@/$ac_var_datarootdir/g
s/@sysconfdir@/$ac_var_prefix\/etc/g
s/@sharedstatedir@/$ac_var_prefix\/com/g
s/@localstatedir@/$ac_var_prefix\/var/g
s/@includedir@/${ac_var_includedir:=$ac_var_prefix\/include}/g
s/@oldincludedir@/${ac_var_oldincludedir:=\/usr\/include}/g
s/@docdir@/${ac_var_docdir:=$ac_var_datarootdir\/doc\/$PKG_NAME}/g
s/@infodir@/$ac_var_datarootdir\/info/g
s/@htmldir@/$ac_var_docdir/g
s/@dvidir@/$ac_var_docdir/g
s/@pdfdir@/$ac_var_docdir/g
s/@psdir@/$ac_var_docdir/g
s/@libdir@/${ac_var_libdir:=$ac_var_exec_prefix\/lib}/g
s/@localedir@/$ac_var_datarootdir\/locale/g
s/@mandir@/$ac_var_datarootdir\/man/g
s/@gccincludedir@/${ac_var_gccincludedir:=`echo $PINCDIR | sed 's/\//\\\&/g'`}/g
s/@gcclibdir@/${ac_var_gcclibdir:=`echo $PLIBDIR | sed 's/\//\\\&/g'`}/g
s/@customincdir@/${ac_var_customincdir:=$ac_var_prefix\/include}/g
s/@customlibdir@/${ac_var_customlibdir:=$ac_var_prefix\/lib}/g" >>config.sed

if [ "$ac_var_prefix" != "\/usr\/local" -a "$ac_var_prefix" != "\/usr" ]; then
    echo "s/ \?@CUSTOMINCDIR@/ -I$ac_var_customincdir/g
s/ \?@CUSTOMLIBDIR@/ -L$ac_var_customlibdir/g" >>config.sed
else
    echo "s/ \?@CUSTOMINCDIR@//g
s/ \?@CUSTOMLIBDIR@//g" >>config.sed
fi

#### Find headers, libs, programs, and subs ##########################

SubHeadLibsProgs() {
local INCPATH LIBPATH LIBSUFFIX found pname pcall esciv
INCPATH="$ac_var_oldincludedir $ac_var_includedir $ac_var_gccincludedir $ac_var_customincdir"
INCPATH=`echo $INCPATH | sed 's/\\\\//g'`
for i in $HEADERS; do
    for p in $INCPATH; do
	if [ -r "$p/$i" ]; then
	    echo 's/#undef \(HAVE_'`echo $i|tr a-z/.- A-Z___`'\)/#define \1 1/' >>config.sed
	    break
	fi
    done
done

LIBPATH="`echo $LD_LIBRARY_PATH | tr ':' ' '` $ac_var_libdir $ac_var_gcclibdir $ac_var_customlibdir /usr/lib /usr/local/lib /lib"
LIBPATH=`echo $LIBPATH | sed 's/\\\\//g'`
LIBSUFFIX="so a la dylib"
for i in $LIBS; do
    found=
    for p in $LIBPATH; do
	for s in $LIBSUFFIX; do
	    if [ -r "$p/lib$i.$s" ]; then
		found=" -l$i"
		break
	    fi
	done
	[ -z "$found" ] || break
    done
    echo "s/ \?@lib$i@/$found/g" >>config.sed
done

for i in $PROGS; do
    pname=`expr "$i" : '\([^=]*\)=[^=]*'`
    pcall=`expr "$i" : '[^=]*=\([^=]*\)'`
    esciv="`eval echo \$\{$pname\}|sed 's/\//\\\\\//g'`"
    # First check if an environment variable is set
    [ ! -z "$esciv" ] && echo "s/@$pname@/$esciv/g" >>config.sed
    # Check if the program exists
    [ -x `which $pcall 2>/dev/null` ] && echo "s/@$pname@/$pcall/g" >>config.sed
done
# If nothing found in first loop, set the first pair anyway.
for i in $PROGS; do
    pname=`expr "$i" : '\([^=]*\)=[^=]*'`
    pcall=`expr "$i" : '[^=]*=\([^=]*\)'`
    echo "s/@$pname@/$pcall/g" >>config.sed
done
# And, finally, the environment variables
for i in $ENVIRONS; do
    esciv="`eval echo '"'\$\{$i\}'"'|sed 's/\//\\\&/g'`"
    [ ! -z "$esciv" ] && esciv=" $esciv"
    echo "s/ \?@$i@/$esciv/g" >>config.sed
done
echo "$CUSTSUBS" >>config.sed
}
SubHeadLibsProgs

#### Apply substitutions to all files ################################

for i in $FILES; do
    sed -f config.sed $i.in > $i
done

touch config.status
echo "#! /bin/sh
$0 $*
`tail -n+3 config.status`" > config.status.new
chmod u+x config.status.new
mv config.status.new config.status

die