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Makefile.PL
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Makefile.PL
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use Data::Dumper;
use Config;
use Cwd qw(abs_path);
use ExtUtils::MakeMaker 6.64;
use Getopt::Long;
use File::Spec;
use File::Basename;
GetOptions(
'gdb:s' => \$gdb,
debug => \$debug,
help => \$help,
);
usage() if $help;
#============================================================================
# What python are we going to try?
#============================================================================
my $sel = $ENV{INLINE_PYTHON_EXECUTABLE};
my $num_python3 = 0;
unless ($sel) {
my @pythons;
my %pythons;
my $sep = $^O eq 'MSWin32' ? ";" : ":";
my $exe = $^O eq 'MSWin32' ? ".exe" : "";
for $p (split /$sep/, $ENV{PATH}) {
$p =~ s/^~/$ENV{HOME}/;
for $exe_version ('3', '') {
my $py = File::Spec->catfile($p, "python$exe_version$exe");
next unless -f $py and -x $py;
next if $pythons{abs_path($py)}++; # filter symlinked duplicates
my $version = get_python_major_version($py);
push @pythons, { path => $py, version => $version };
$num_python3++ if ($version == 3);
}
}
# Keep them in PATH order.
# @pythons = sort { $a->{path} cmp $b->{path} } @pythons;
my $num = 1;
print "Found these python executables on your PATH:\n";
print $num++ . ". " . $_->{path} . "\n" for @pythons;
if (@pythons == 1 and not $sel) {
$sel = $pythons[0];
print "Using the only python executable I could find\n";
print 'Set the INLINE_PYTHON_EXECUTABLE environment variable to'
. " the full path to your python executable to override this selection.\n";
} elsif ($num_python3 == 1) { # Prefer python 3
for my $python (@pythons) {
if ($python->{version} == 3) {
$sel = $python;
print "Using the only python 3 executable I could find even though python 2 was also found\n";
print 'Set the INLINE_PYTHON_EXECUTABLE environment variable to'
. " the full path to your python executable to override this selection.\n";
last;
}
}
}
unless ($sel) {
$sel = prompt("Use which?", '1');
if ($sel =~ /^\d+$/) {
die 'Invalid number. Please enter only numbers from 1 to ' . ($num - 1)
. " or the full path to your python executable.\n"
. 'Set the INLINE_PYTHON_EXECUTABLE environment variable to'
. " the full path to your python executable to avoid this question.\n"
if $sel > ($num - 1);
$sel = $pythons[$sel - 1];
}
}
}
$sel = { path => $sel } unless ref $sel eq 'HASH'; # in case the user entered a path
print "Using $sel->{path}\n";
my $py_major_version = get_python_major_version($sel->{path});
#============================================================================
# Interrogate the python interpreter (or the user) for required flags
#============================================================================
interrogate($sel);
# Fix up the libpath and libpython
die "Could not find Python.h in include path. make will not work"
unless -e File::Spec->catfile($sel->{incpath}, "Python.h");
substr($sel->{incpath}, 0, 0) = "-I";
substr($sel->{libpath}, 0, 0) = "-L";
$sel->{libpython} =~ s/lib(.*)(?:\.\Q$Config{dlext}\E|\Q$Config{_a}\E)/-l$1/;
my @flags;
push @flags, debug_flag() if defined $gdb;
push @flags, '-DI_PY_DEBUG' if $debug;
push @flags, "-DPY_MAJOR_VERSION=$py_major_version";
push @flags, 'none (perl Makefile.PL --help for details)' unless @flags;
$sel->{syslib} = '' if $sel->{syslib} eq "None";
print <<END;
Using These Settings:
Extra Libs: $sel->{syslibs}
Python Lib: $sel->{libpath} $sel->{libpython}
Includes: $sel->{incpath}
Extra Flags: @flags
END
#============================================================================
# Finalize, and write the makefile
#============================================================================
$defs = join ' ', qw(-DEXPOSE_PERL -DCREATE_PYTHON -UCREATE_PERL),
$debug ? "-DI_PY_DEBUG" : ();
WriteMakefile(
$defs ? (DEFINE => $defs) : (),
defined $gdb ? (OPTIMIZE => debug_flag()) : (),
INC => $sel->{incpath},
LIBS => (join " ", @$sel{qw(libpath libpython syslibs)}),
NAME => 'Inline::Python',
ABSTRACT_FROM => 'Python.pod',
AUTHOR => 'Neil Watkiss <[email protected]>',
LICENSE => 'perl',
VERSION_FROM => 'Python.pm',
PREREQ_PM => {
'Inline' => 0.46,
'Digest::MD5' => 2.50,
'Data::Dumper' => 0,
'File::Spec' => 0,
},
TEST_REQUIRES => {
'Test' => 0,
'Test::More' => 0,
'Test::Deep' => 0,
'Test::Number::Delta' => 0,
'Proc::ProcessTable' => '0.53',
},
OBJECT => 'Python.o py2pl.o perlmodule.o util.o',
META_MERGE => {
"meta-spec" => { version => 2 },
resources => {
repository => {
type => 'git',
url => 'http://github.com/niner/inline-python-pm.git',
web => 'http://github.com/niner/inline-python-pm',
},
},
},
clean => {FILES => 'blib_test/'},
dynamic_lib => {
OTHERLDFLAGS => ($sel->{rpath} ? "-Wl,-rpath,$sel->{rpath}" : ''),
},
);
#============================================================================
# Tries to ask the python interpreter what libraries we need, where its
# include directories are, etc.
# Typical values of the Python sysconfig variables:
#
# - VERSION
#
# - Ubuntu : 3.10
# - Windows: 310
# - macOS : 3.10
#
# - BINDIR
#
# - Ubuntu :
# - system version: /usr/bin
# - pyenv version : /home/username/.pyenv/versions/3.9.4/bin
# - Windows : C:\Python\Python310 (NOTE: missing trailing "bin")
# - macOS :
# - system version : /Applications/Xcode.app/Contents/Developer/Library
# /Frameworks/Python3.framework/Versions/3.8/bin
# - pyenv version : /Users/username/.pyenv/versions/3.10.0-debug/bin
#
# - LIBS:
#
# - Ubuntu : -lcrypt -lpthread -ldl -lutil -lm
# - Windows: [None]
# - macOS :
# - system version : -ldl -lSystem -framework CoreFoundation
# - pyenv version : -ldl -framework CoreFoundation
#
# - INCLUDEPY
#
# - Ubuntu : /usr/include/python3.9
# - Windows: C:\Python\Python310\Include
# - macOS
# - system version : /Applications/Xcode.app/Contents/Developer/Library
# /Frameworks/Python3.framework/Versions/3.8/Headers
# - pyenv version : /Users/username/.pyenv/versions/3.10.0-debug/include/python3.10d
#
# - LIBPL
#
# - Ubuntu :
# - system version : /usr/lib/python3.9/config-3.9-x86_64-linux-gnu
# - pyenv version : /home/username/.pyenv/versions/3.8.9
# /lib/python3.8/config-3.8-x86_64-linux-gnu (NOTE: this folder does
# not contain a shared library even if python was built with
# --enable-shared. However, the folder LIBDIR, see below, does)
# - Windows: [None] (NOTE: this should be "$BINDIR/libs" on windows)
# - macOS :
# - system version : /Applications/Xcode.app/Contents/Developer/Library/Frameworks
# /Python3.framework/Versions/3.8/lib/python3.8/config-3.8-darwin
# - pyenv version : /Users/username/.pyenv/versions/3.10.0-debug/lib
# /python3.10/config-3.10d-darwin
#
# - LDLIBRARY
#
# - Ubuntu :
# - if python was built with --enable-shared : libpython3.9.so
# - else : libpython3.9.a
# - Windows: [None] (NOTE: this should be "python310.lib" on windows,
# where a .lib file is a so-called import-library on Windows. The
# import library reference a .dll library in $BINDIR.
# On Windows there is also a stable-across-versions-subset library
# called "python3.lib" (which references "python3.dll" in $BINDIR,
# see https://www.python.org/dev/peps/pep-0384/ for more information.)
# - macOS :
# - system version: Python3.framework/Versions/3.8/Python3 (NOTE: this is a .dylib
# i.e. a shared library)
# - pyenv version :
# - if built with --enable-shared : libpython3.10d.dylib
# - else : libpython3.10d.a
#
# - LIBRARY
#
# - Ubuntu : libpython3.9.a
# - Windows: [None] (NOTE: static library is not available but import library exists
# see note on LDLIBRARY above)
# - macOS : libpython3.10d.a
#
# - LIBDEST
#
# - Ubuntu : /home/username/.pyenv/versions/3.9.4/lib/python3.9
# - Windows: C:\Python310\Lib (NOTE: this folder does not contain anything interesting
# to us. No static or shared libraries here, but the import
# library is in the libs folder C:\Python310\libs and the
# .dll library is in the BINDIR C:\Python310)
# - macOS :
# - system version : /Applications/Xcode.app/Contents/Developer/Library
# /Frameworks/Python3.framework/Versions/3.8/lib/python3.8
# - pyenv version : /Users/username/.pyenv/versions/3.10.0-debug/lib/python3.10
#
# - LIBDIR
#
# - Ubuntu :
# - system version : /usr/lib/x86_64-linux-gnu
# - pyenv version : /home/username/.pyenv/versions/3.9.4/lib
# - Windows : [None]
# - macOS :
# - system version: /Applications/Xcode.app/Contents/Developer/Library
# /Frameworks/Python3.framework/Versions/3.8/lib
# - pyenv version : /Users/username/.pyenv/versions/3.10.0-debug/lib
#
#============================================================================
sub interrogate {
my $ref = shift;
return query_options($ref) unless test_interrogate($ref);
$ref->{syslibs} = get_config_var($ref, "LIBS");
$ref->{incpath} = get_config_var($ref, "INCLUDEPY");
$ref->{libpath} = get_config_var($ref, "LIBPL");
$ref->{ldlib} = get_config_var($ref, "LDLIBRARY");
$ref->{libpython} = get_config_var($ref, "LIBRARY");
my $tmp = File::Spec->canonpath($ref->{libpython});
my @dirs = File::Spec->splitdir( $tmp );
$ref->{libpython} = $dirs[-1];
# On Windows, Python config var "LIBRARY" is not defined
if ($ref->{libpython} eq 'None') {
special_get_libpath($ref);
}
$ref->{libpath} = File::Spec->catfile(get_config_var($ref, "LIBDEST"), 'config')
if ($ref->{libpath} eq 'None');
$ref->{rpath} = ''; # only used if we are linking with a shared library, see below.
$ref->{cflags} = get_config_var($ref, 'CFLAGS');
$ref->{config_args} = get_config_var($ref, 'CONFIG_ARGS');
$ref->{enable_shared} = (get_config_var($ref, 'Py_ENABLE_SHARED') eq "1");
if (using_macos_system_python($ref)) {
add_rpath_for_macos_system_python($ref);
}
elsif ($^O ne "MSWin32") { # we use the import library on Windows,
# see special_get_libpath() below
special_non_windows_check_shared_static_libs($ref);
}
return query_options($ref) unless sanity_check($ref);
}
# on macOS using the system python, the path to the shared and static libraries
# is given by "libpath" (LIBPL). In this directory there exists two files:
# - libpythonxxx.a
# - libpythonxxx.dylib
# the first name (the static library libpythonxxx.a) is given by the python sysconfig
# variable "libpython" (LIBRARY). However, both these files are symlinks to a shared
# library called "Python" which is located relative to LIBPL with path:
# ../../../Python3. This file "Python3" (or "Python2" ??), is a dylib with an embedded
# @rpath magic search path given by: @rpath/Python3.framework/Versions/3.8/Python3 which
# is also the ID of the library (LC_ID_DYLIB) which means that Python.so (the Perl
# generated interface) must include an rpath to the directory 3 levels above the
# location of "Python3" (which is 6 levels above libpythonxxx.dylib in LIBPL).
# This directory is fortunately given by the config variable
# PYTHONFRAMEWORKPREFIX.
#
sub add_rpath_for_macos_system_python {
my ($ref) = @_;
$ref->{rpath} = get_config_var($ref, 'PYTHONFRAMEWORKPREFIX');
};
sub special_non_windows_check_shared_static_libs {
my ($ref) = @_;
if (shared_lib_priority($ref)) {
$ref->{libpython} = $ref->{ldlib};
$ref->{rpath} = $ref->{libpath};
}
else {
if (!check_static_library_ok($ref)) {
# In this case we may find a shared library to link with in
# $LIBDIR instead of in $LIBPL, this happens if you install Python
# with pyenv (on the other hand for the system python there will
# a shared library in both $LIBDIR and $LIBPL, see issue #29 for more information.
# TODO: However, this still does not work for pyenv (tested on Ubuntu). For some
# reason this shared library does not behave well unless python was also compiled
# with -fPIC option.
if (( $ref->{cflags} !~ /\Q-fPIC\E/i) && ($ref->{path} !~ m{^/(?:usr/)?bin/python})) {
if ($ref->{enable_shared}) {
warn "WARNING: This python's shared library was compiled with --enable-shared but not "
." with -fPIC option, this might lead to strange runtime behavior.\n";
}
else {
# TODO: strangely this seems to work fine on macOS.
# More investigation is needed here...
warn "WARNING: This python was not compiled with --enable-shared and not "
. "with -fPIC.\n"
. "WARNING: This is known to not work on linux.\n";
}
}
$ref->{libpython} = $ref->{ldlib};
my $shared_lib = File::Spec->catfile($ref->{libpath}, $ref->{libpython});
if (!-f $shared_lib) {
$ref->{libpath} = get_config_var($ref, "LIBDIR");
}
else {
$ref->{rpath} = $ref->{libpath};
}
}
}
}
sub shared_lib_priority {
my ($ref) = @_;
if ($ref->{libpython} ne $ref->{ldlib}) {
# This should happen if python was compiled with --enable-shared
# In this case the linker will prefer the shared library
my $static_lib = File::Spec->catfile($ref->{libpath}, $ref->{libpython});
my $shared_lib = File::Spec->catfile($ref->{libpath}, $ref->{ldlib});
return 1 if (-f $static_lib) && (-f $shared_lib);
}
return 0;
}
sub check_static_library_ok {
my ($ref) = @_;
my $static_lib = File::Spec->catfile($ref->{libpath}, $ref->{libpython});
return 0 if (!-f $static_lib);
# We should check if the static library was compiled with -fPIC, or else
# we cannot create a shared Python.so from it.
# TODO: It seem like it is possible to build python with --enable-shared
# and without CFLAGS=-fPIC, and this will make both libpythonxx.so and
# libpythonxx.a position independent, but in this case strange things
# may happen at runtime (i.e. when running "make test"), see issue #29
# for more information. This should be investigated futher to determine what
# is actually going on.
# This seems to not be a problem on macOS though.
return 1 if $ref->{cflags} =~ /\Q-fPIC\E/i;
warn "WARNING: The static python library seems not to be position indepenent.\n"
. "WARNING: If this does not work you should try again with a "
. "python version that was compiled with CFLAGS=-fPIC\n";
return 0;
}
sub using_macos_system_python {
my ($ref) = @_;
return ($^O eq "darwin") && ($ref->{path} =~ m{^/usr/bin/python});
}
sub check_shared_lib_support() {
my ($ref) = @_;
# Windows python always have a shared lib
return 1 if $^O eq "MSWin32";
# The system python always have a shared lib on macOS
return 1 if using_macos_system_python($ref);
# See https://stackoverflow.com/a/23202055/2173773
return $ref->{enable_shared};
}
sub get_python_version {
my $ref = shift;
my $major = `$ref->{path} -c "import sys; print(sys.version_info[0])"`;
my $minor = `$ref->{path} -c "import sys; print(sys.version_info[1])"`;
return ($major, $minor);
}
# On Windows, Python config var "LIBRARY" is not defined, so we try another method
# to obtain the library path name
sub special_get_libpath {
my $ref = shift;
my ($major, $minor) = get_python_version($ref);
my $cmd;
if (($major == 3 && $minor >=10) || $major > 3 ) {
$cmd = 'import setuptools.command.build_ext; d=setuptools.dist.Distribution();'
.'b=setuptools.command.build_ext.build_ext(d)';
}
else {
$cmd = 'import distutils.command.build_ext; d=distutils.core.Distribution();'
. 'b=distutils.command.build_ext.build_ext(d)';
}
my @lines = `$ref->{path} -c "$cmd;b.finalize_options();print(b.library_dirs[0])" 2>&1`;
my $val = $lines[-1];
chomp $val;
return '' if !$val;
# On Windows, $val should now be equal to $BINDIR/libs
my $pyscript = "import sysconfig; "
. "print(sysconfig.get_config_var('VERSION'))";
my $version = `$ref->{path} -c "$pyscript"`;
chomp $version;
$ref->{libpath} = $val;
$ref->{libpython} = "python${version}.lib"; # Note: on Windows this is an import library,
# that referes to a shared library
# (not a static library)
# The above file should always exist, alternatively we could
# set libpath to $BINDIR and libpython to python$version.dll and use the shared library
# directly instead of using the import library.
return $val;
}
sub test_interrogate {
my $ref = shift;
`$ref->{path} -c "import sysconfig; sysconfig.get_config_var" 2>&1`;
print <<END if $?;
This python is so old it doesn't know how to answer my questions.
Instead, you will be asked a series of questions about it. If possible,
I will give you a set of reasonable options to choose from. You can
always enter the complete answer yourself if none of mine are correct.
END
#' stupid vim.
return $? == 0 ? 1 : 0;
}
sub sanity_check {
my $ref = shift;
$ref->{libpython} = $ref->{ldlib}
if not -f File::Spec->catfile($ref->{libpath}, $ref->{libpython})
and -f File::Spec->catfile($ref->{libpath}, $ref->{ldlib});
my $libpath = File::Spec->catfile($ref->{libpath}, $ref->{libpython});
unless (-d $ref->{libpath} &&
-d $ref->{incpath} &&
(-f File::Spec->catfile($ref->{libpath}, $ref->{libpython}))
) {
print <<END and return 0;
This python's configuration files are messed up. You'll have have to
answer the questions yourself. Here is what Python said:
Extra Libs: $ref->{syslibs}
Python Library: $libpath
Include Path: $ref->{incpath}
END
# ' stupid vim.
}
return 1;
}
sub get_python_major_version {
my $exe = shift;
my $version = `$exe --version 2>&1`;
$version =~ /(\d+)\./;
return $1;
}
sub get_config_var {
my $ref = shift;
my $key = shift;
my $exe = $ref->{path};
my $val = `$exe -c "import sysconfig; print(sysconfig.get_config_var('$key'))"`;
chomp $val;
return $val;
}
sub get_default_python_lib_index {
my $r_found_libs=shift;
# Avoid limited API libraries (ABI), which are versionned with 1 digit only
# (cf https://docs.python.org/3/c-api/stable.html)
for my $i (0..$#{$r_found_libs}) {
return ($i+1) if($r_found_libs->[$i] =~ /python\d\.?\d[^\/\\]+$/i);
}
return 1;
}
sub query_options {
my $ref = shift;
# Every python I've seen needs pthreads. Obviously not on windows.
my $libs_guess = $ref->{syslibs} ? $ref->{syslibs} :
$^O eq 'MSWin32' ? '' : '-lpthread';
print <<END;
1. LIBS option. I need to know what extra libraries, if any,
are required by this build of python. I recommend this:
${ $libs_guess ? \$libs_guess : \"No extra libraries" }
END
$ref->{syslibs} = prompt("Enter extra libraries (e.g. -lfoo -lbar)",
$libs_guess);
print <<END;
2. LIBRARY option. The location of the python library.
Inline::Python needs to link against it to use Python.
Here are the libraries I know about:
END
my @libs = show_python_libs($ref);
my $defaultLibIndex = $^O eq 'MSWin32' ? get_default_python_lib_index(\@libs) : 1;
my $lib = prompt("Which? Or enter another.", $defaultLibIndex);
$lib = $libs[$lib-1] if $lib =~ /^\d+$/;
$lib =~ s|\\|/|g;
my ($volume, $directories, $file) = File::Spec->splitpath( $lib );
$ref->{libpath} = File::Spec->canonpath(File::Spec->catpath($volume, $directories));
$ref->{libpython} = $file;
print <<END;
3. INCLUDE option. The location of the python include files.
Inline::Python needs these to compile.
Here are the locations I know about:
END
my @incs = show_python_incs($ref);
my $inc = prompt("Which? Or enter another.", '1');
$inc = $incs[$inc-1] if $inc =~ /^\d+$/;
$ref->{incpath} = $inc;
}
#============================================================================
# Python libraries to look for
#============================================================================
sub show_python_libs {
my $ref = shift;
my $exe = $ref->{path};
# Convert the exe into a glob where we might find a library:
$exe =~ s|[^/]+$||;
$exe .= "../lib/python*/config/libpython*";
my @py_libs =
(
(map { $exe . $_ } '.a', '.so', '.lib'),
'/usr/lib64/libpython*.a',
'/usr/lib64/libpython*.so',
'/usr/lib/libpython*.a',
'/usr/lib/libpython*.so',
'/usr/lib64/python*/config/libpython*.a',
'/usr/lib64/python*/config/libpython*.so',
'/usr/lib/python*/config/libpython*.a',
'/usr/lib/python*/config/libpython*.so',
'/usr/local/lib/libpython*.a',
'/usr/local/lib/libpython*.so',
'/usr/local/ActivePython-*/lib/python*/config/libpython*.a',
'/usr/local/ActivePython-*/lib/python*/config/libpython*.so',
# Win32 support
'C:/Python*/libs/python*.lib',
'C:/Program Files/Python*/libs/python*.lib',
);
my (@found, %found);
push @found, grep { -f && $found{abspath($_)}++ == 0 } glob for @py_libs;
@found = sort map { abspath($_) } @found;
my $num = '1';
print "\t " . $num++ . ") " . $_ . "\n" for @found;
print "\n";
return @found;
}
#============================================================================
# Python include files to look for
#============================================================================
sub show_python_incs {
my $ref = shift;
my $exe = $ref->{path};
# Convert the exe into a glob where we might find the includes:
$exe =~ s|[^/]+$||;
$exe .= "../include/python*";
my @py_incs;
if ($^O eq "MSWin32") {
@py_incs = (
'C:\Python*\include',
'C:\Program Files\Python*\include'
);
}
else {
@py_incs = (
$exe,
'/usr/local/ActivePython-*/include/python*',
'/usr/include/python*',
'/usr/local/include/python*',
);
}
my (@found, %found);
push @found, grep { -d && $found{abspath($_)}++ == 0 } glob for @py_incs;
@found = sort map { abspath($_) } @found;
my $num = 1;
print "\t " . $num++ . ") " . $_ . "\n" for @found;
print "\n";
return @found;
}
# This can deal with files as well as directories
sub abspath {
use Cwd qw(abs_path);
my ($path, $file) = shift;
if (-f $path) {
my @parts = File::Spec->splitpath($path);
$path = File::Spec->canonpath(File::Spec->catpath(@parts[0..1]));
$file = $parts[-1];
}
$path = abs_path($path);
return defined $file ? File::Spec->catfile($path, $file) : $path;
}
sub debug_flag {
return $gdb if $gdb;
$Config{osname} eq 'MSWin32' ? return '-Zi' : return '-g';
}
sub usage {
print <<'END';
Options:
-gdb: Turn on compiler's debugging flag (use my guess).
-gdb=x Pass your own debugging flag, not mine.
-debug: Turn on many diagnostic print statements inside Inline::Python.
This option is useful for tracing the execution path when
debugging.
-help: This output.
END
# ' stupid vim
exit 0;
}