configure

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

PKG_NAME="ustl"
PKG_VERSTR="v2.5"

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 c++abi 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_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; }
sub() { printf "%s\n" "$1">>config.sed; }
escpath() { echo $1 | sed 's/\//\\\//g'; }

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

if [ -z "$CC" ]; then
    for i in gcc clang cc g++ clang++ c++; 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 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__)
#if !defined(BSD) || defined(__APPLE__)
    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)
	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__ >= 6)) || __GNUC__ > 4
	printf (" -std=c++14 -march=native");
    #elif (__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
    sub "s/-Wredundant-decls/-Wno-redundant-decls/;s/@SHBLDFL@/-G/"
else
    sub "s/#undef \(HAVE_THREE_CHAR_TYPES\)/#define \1 1/"
fi
if [ "$SYSNAME" = "bsd" ]; then
    sub 's/ @libgcc_eh@//g
	s/#define WITHOUT_LIBSTDCPP 1/#undef WITHOUT_LIBSTDCPP/
	s/NOLIBSTDCPP	= -nodefaultlibs /#NOLIBSTDCPP	= -nodefaultlibs/
	s/-Wredundant-decls/-Wno-redundant-decls/
	s/-Winline/-Wno-inline/
	s/#define HAVE_VA_COPY 1/#undef HAVE_VA_COPY/'
fi
if [ "$SYSNAME" = "linux" -o "$SYSNAME" = "bsd" ]; then
    sub 's/@SHBLDFL@/-shared -Wl,-soname=$1/'
elif [ "$SYSNAME" = "alpha" ]; then
    sub "s/BUILD_SHARED	= 1 /#BUILD_SHARED	= 1/;s/#BUILD_STATIC	= 1/BUILD_STATIC	= 1 /"
fi
if [ "$SYSNAME" = "mac" ]; then
    sub 's/ @libgcc_eh@//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/ -s -Wl,-gc-sections/ -mmacosx-version-min=10.9/g
	s/@SHBLDFL@/-Wl,-single_module -compatibility_version 1 -current_version 1 -install_name $1 -Wl,-Y,1455 -dynamiclib -mmacosx-version-min=10.9/g'
    if [ "$CC" = "clang" ]; then
	sub "s/ @libsupc++@/ @libc++abi@/g"
    fi
fi
if [ "$SYSNAME" = "alpha" -o "$SYSNAME" = "mac" ]; then
    sub "s/#undef \(SIZE_OF_BOOL\)/#define \1 SIZE_OF_LONG/"
else
    sub "s/#undef \(SIZE_OF_BOOL\)/#define \1 SIZE_OF_CHAR/"
fi
if [ "$SYSNAME" = "linux" ]; then
    sub "s/#undef \(HAVE_RINTF\)/#define \1 1/"
else
    sub "s/-p --ignore-fail-on-non-empty//;s/ -mfpmath=sse//"
fi
if [ "$SYSNAME" = "mac" -o "$SYSNAME" = "bsd" ]; then
    sub "s/#define \(HAVE_STRSIGNAL\) 1/#undef \1/g"
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]
  --libdir=DIR		object code libraries [PREFIX/lib]
  --includedir=DIR	C header files [PREFIX/include]
  --gccincludedir=DIR	GCC internal header files [PREFIX/include]
  --customincdir=DIR	Additional include directory
  --customlibdir=DIR	Additional library directory
  --builddir=DIR	location for compiled objects [/tmp/$USER/make]
"
    PrintComponents
    echo "Report bugs to $PKG_BUGREPORT."
}

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

SubVar() {
    local esc2
    esc2=`escpath $2`
    eval ac_var_$1='$esc2';
    sub "s/@$1@/$esc2/g"
}

SubComp() {
    local cc name seds
    cc=$COMPONENTS
    while [ ! -z "$cc" ]; do
	name=`expr "$cc" : '[^}]*name=\[\([^]]*\)\]'`
	seds=`expr "$cc" : '[^}]*seds=\[\([^]]*\)\]'`
	[ "$name" = "$1" ] && sub "$seds"
	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 ##########################################

sub "s/@prefix@/${ac_var_prefix:=\/usr\/local}/g
s/@bindir@/$ac_var_prefix\/bin/g
s/@datadir@/${ac_var_datadir:=$ac_var_prefix\/share}/g
s/@sysconfdir@/$ac_var_prefix\/etc/g
s/@localstatedir@/$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:=$ac_var_datadir\/doc\/$PKG_NAME}/g
s/@libdir@/${ac_var_libdir:=$ac_var_prefix\/lib}/g
s/@localedir@/$ac_var_datarootdir\/locale/g
s/@mandir@/$ac_var_datarootdir\/man/g
s/@builddir@/\/tmp\/$USER\/make/g
s/@gccincludedir@/${ac_var_gccincludedir:=`escpath $PINCDIR`}/g
s/@gcclibdir@/${ac_var_gcclibdir:=`escpath $PLIBDIR`}/g
s/@customincdir@/${ac_var_customincdir:=$ac_var_prefix\/include}/g
s/@customlibdir@/${ac_var_customlibdir:=$ac_var_prefix\/lib}/g"

if [ "$ac_var_prefix" != "\/usr\/local" -a "$ac_var_prefix" != "\/usr" ]; then
    sub "s/ @CUSTOMINCDIR@/ -I$ac_var_customincdir/g;s/ @CUSTOMLIBDIR@/ -L$ac_var_customlibdir/g"
else
    sub "s/ @CUSTOMINCDIR@//g;s/ @CUSTOMLIBDIR@//g"
fi

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

SubHeadLibsProgs() {
local INCPATH LIBPATH LIBSUFFIX found pname pcall esciv
INCPATH="$ac_var_includedir $ac_var_gccincludedir $ac_var_customincdir $ac_var_oldincludedir /usr/include/x86_64-linux-gnu"
INCPATH=`echo $INCPATH | sed 's/\\\\//g'`
for i in $HEADERS; do
    for p in $INCPATH; do
	if [ -r "$p/$i" ]; then
	    sub "s/#undef \(HAVE_`echo $i|tr a-z/.- A-Z___`\)/#define \1 1/"
	    break
	fi
    done
done

LIBPATH="`echo $LD_LIBRARY_PATH | tr ':' ' '` $ac_var_libdir $ac_var_gcclibdir $ac_var_customlibdir /lib /usr/lib /usr/local/lib /usr/lib/x86_64-linux-gnu"
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
    sub "s/ @lib$i@/$found/g"
done

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