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‎lib/node_modules/@stdlib/stats/base/ndarray/smeanpw/README.md‎

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@license Apache-2.0
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Copyright (c) 2025 The Stdlib Authors.
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Copyright (c) 2026 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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<!-- /.examples -->
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<!-- C interface documentation. -->
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* * *
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<section class="c">
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## C APIs
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<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
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<section class="intro">
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</section>
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<!-- /.intro -->
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<!-- C usage documentation. -->
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<section class="usage">
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### Usage
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```c
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#include "stdlib/stats/base/ndarray/smeanpw.h"
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```
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#### stdlib_stats_smeanpw( arrays )
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Computes the arithmetic mean of a one-dimensional single-precision floating-point ndarray using pairwise summation.
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```c
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#include "stdlib/ndarray/ctor.h"
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#include "stdlib/ndarray/dtypes.h"
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#include "stdlib/ndarray/index_modes.h"
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#include "stdlib/ndarray/orders.h"
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#include "stdlib/ndarray/base/bytes_per_element.h"
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#include <stdint.h>
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// Create an ndarray:
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const float data[] = { 1.0f, 2.0f, 3.0f, 4.0f };
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int64_t shape[] = { 4 };
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int64_t strides[] = { STDLIB_NDARRAY_FLOAT32_BYTES_PER_ELEMENT };
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int8_t submodes[] = { STDLIB_NDARRAY_INDEX_ERROR };
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struct ndarray *x = stdlib_ndarray_allocate( STDLIB_NDARRAY_FLOAT32, (uint8_t *)data, 1, shape, strides, 0, STDLIB_NDARRAY_ROW_MAJOR, STDLIB_NDARRAY_INDEX_ERROR, 1, submodes );
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// Compute the arithmetic mean:
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const struct ndarray *arrays[] = { x };
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float v = stdlib_stats_smeanpw( arrays );
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// returns 2.5f
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// Free allocated memory:
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stdlib_ndarray_free( x );
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```
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The function accepts the following arguments:
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- **arrays**: `[in] struct ndarray**` list containing a one-dimensional input ndarray.
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```c
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float stdlib_stats_smeanpw( const struct ndarray *arrays[] );
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```
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</section>
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<!-- /.usage -->
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<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="notes">
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</section>
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<!-- /.notes -->
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<!-- C API usage examples. -->
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<section class="examples">
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### Examples
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```c
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#include "stdlib/stats/base/ndarray/smeanpw.h"
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#include "stdlib/ndarray/ctor.h"
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#include "stdlib/ndarray/dtypes.h"
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#include "stdlib/ndarray/index_modes.h"
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#include "stdlib/ndarray/orders.h"
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#include "stdlib/ndarray/base/bytes_per_element.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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int main( void ) {
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// Create a data buffer:
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const float data[] = { 1.0f, -2.0f, 3.0f, -4.0f, 5.0f, -6.0f, 7.0f, -8.0f };
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// Specify the number of array dimensions:
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const int64_t ndims = 1;
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// Specify the array shape:
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int64_t shape[] = { 4 };
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// Specify the array strides:
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int64_t strides[] = { 2*STDLIB_NDARRAY_FLOAT32_BYTES_PER_ELEMENT };
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// Specify the byte offset:
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const int64_t offset = 0;
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// Specify the array order:
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const enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;
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// Specify the index mode:
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const enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;
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// Specify the subscript index modes:
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int8_t submodes[] = { STDLIB_NDARRAY_INDEX_ERROR };
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const int64_t nsubmodes = 1;
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// Create an ndarray:
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struct ndarray *x = stdlib_ndarray_allocate( STDLIB_NDARRAY_FLOAT32, (uint8_t *)data, ndims, shape, strides, offset, order, imode, nsubmodes, submodes );
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if ( x == NULL ) {
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fprintf( stderr, "Error allocating memory.\n" );
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exit( 1 );
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}
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// Define a list of ndarrays:
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const struct ndarray *arrays[] = { x };
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// Compute the arithmetic mean:
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float v = stdlib_stats_smeanpw( arrays );
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// Print the result:
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printf( "mean: %f\n", v );
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// Free allocated memory:
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stdlib_ndarray_free( x );
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}
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```
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</section>
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<!-- /.examples -->
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</section>
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<!-- /.c -->
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* * *
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<section class="references">

‎lib/node_modules/@stdlib/stats/base/ndarray/smeanpw/benchmark/benchmark.js‎

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var ndarray = require( '@stdlib/ndarray/base/ctor' );
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var format = require( '@stdlib/string/format' );
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var pkg = require( './../package.json' ).name;
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var smeanpw = require( './../lib' );
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var smeanpw = require( './../lib/main.js' );
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// VARIABLES //

‎lib/node_modules/@stdlib/stats/base/ndarray/smeanpw/binding.gyp‎

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# @license Apache-2.0
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#
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# Copyright (c) 2026 The Stdlib Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# A `.gyp` file for building a Node.js native add-on.
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#
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# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
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# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
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{
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"targets": [
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# List of files to include in this file:
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'includes': [
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'./include.gypi',
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],
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# Define variables to be used throughout the configuration for all targets:
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'variables': {
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# Target name should match the add-on export name:
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'addon_target_name%': 'addon',
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# Set variables based on the host OS:
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'conditions': [
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[
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'OS=="win"',
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{
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# Define the object file suffix:
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'obj': 'obj',
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},
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{
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# Define the object file suffix:
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'obj': 'o',
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}
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], # end condition (OS=="win")
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], # end conditions
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}, # end variables
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# Define compile targets:
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'targets': [
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# Target to generate an add-on:
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{
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"target_name": "addon",
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"dependencies": [
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"<!@(node -p \"var manifest = require('./manifest.json'); manifest.libpath.join('\" \"');\")"
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# The target name should match the add-on export name:
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'target_name': '<(addon_target_name)',
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# Define dependencies:
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'dependencies': [],
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# Define directories which contain relevant include headers:
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'include_dirs': [
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# Local include directory:
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'<@(include_dirs)',
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],
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"sources": [
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"./src/addon.c",
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"./src/main.c"
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# List of source files:
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'sources': [
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'<@(src_files)',
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],
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"libraries": [
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"<!@(node -p \"var manifest = require('./manifest.json'); var libs = manifest.libraries; libs = libs.map(function(lib) { if (process.platform === 'win32') { return lib + '.lib'; } return '-l' + lib; }); libs.join(' ');\")"
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# Settings which should be applied when a target's object files are used as linker input:
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'link_settings': {
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# Define libraries:
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'libraries': [
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'<@(libraries)',
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],
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# Define library directories:
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'library_dirs': [
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'<@(library_dirs)',
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],
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},
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# C/C++ compiler flags:
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'cflags': [
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# Enable commonly used warning options:
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'-Wall',
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# Aggressive optimization:
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'-O3',
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],
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"include_dirs": [
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"./include",
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"<!@(node -p \"require( 'path' ).dirname( require.resolve( '@stdlib/utils/napi/include' ) );\")",
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"<!@(node -p \"var manifest = require('./manifest.json'); var arr = manifest.include; var len = arr.length; var sep = require( 'path' ).sep; var out = ''; var i; for ( i = 0; i < len; i++ ) { if ( i > 0 ) { out += ' '; } out += arr[ i ].replace( /\\\\/g, sep ); } out;\")"
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# C specific compiler flags:
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'cflags_c': [
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# Specify the C standard to which a program is expected to conform:
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'-std=c99',
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],
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"defines": [
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"STDLIB_NDARRAY_STRICT_SINGLE_INDEXING_MODE"
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# C++ specific compiler flags:
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'cflags_cpp': [
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# Specify the C++ standard to which a program is expected to conform:
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'-std=c++11',
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],
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"conditions": [
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# Linker flags:
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'ldflags': [],
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# Apply conditions based on the host OS:
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'conditions': [
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[
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"OS==\"win\"",
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'OS=="mac"',
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{
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"libraries": [
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"<!@(node -p \"var manifest = require('./manifest.json'); var path = require( 'path' ); var libs = manifest.libpath; var sep = path.sep; libs = libs.map(function(lib) { return lib.replace( /\\\\/g, sep ); }); libs.join(' ');\")"
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# Linker flags:
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'ldflags': [
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'-undefined dynamic_lookup',
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'-Wl,-no-pie',
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'-Wl,-search_paths_first',
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],
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"defines": [
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"NOMINMAX"
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]
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}
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],
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},
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], # end condition (OS=="mac")
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[
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"OS!=\"win\"",
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'OS!="win"',
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{
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"cflags": [
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"-std=c99"
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# C/C++ flags:
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'cflags': [
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# Generate platform-independent code:
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'-fPIC',
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],
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"libraries": [
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"<!@(node -p \"var manifest = require('./manifest.json'); var path = require( 'path' ); var libs = manifest.libpath; var sep = path.sep; libs = libs.map(function(lib) { lib = lib.replace( /\\\\/g, sep ); return '-L' + lib; }); libs.join(' ');\")"
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]
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}
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],
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[
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"OS==\"mac\"",
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{
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"xcode_settings": {
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"OTHER_CFLAGS": [
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"-std=c99"
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]
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}
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}
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]
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]
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}
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]
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}
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},
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], # end condition (OS!="win")
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], # end conditions
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}, # end target <(addon_target_name)
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# Target to copy a generated add-on to a standard location:
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{
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'target_name': 'copy_addon',
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# Declare that the output of this target is not linked:
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'type': 'none',
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# Define dependencies:
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'dependencies': [
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# Require that the add-on be generated before building this target:
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'<(addon_target_name)',
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],
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# Define a list of actions:
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'actions': [
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{
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'action_name': 'copy_addon',
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'message': 'Copying addon...',
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# Explicitly list the inputs in the command-line invocation below:
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'inputs': [],
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# Declare the expected outputs:
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'outputs': [
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'<(addon_output_dir)/<(addon_target_name).node',
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],
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# Define the command-line invocation:
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'action': [
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'cp',
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'<(PRODUCT_DIR)/<(addon_target_name).node',
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'<(addon_output_dir)/<(addon_target_name).node',
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],
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},
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], # end actions
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}, # end target copy_addon
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], # end targets
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}

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