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require 'mkmf'
if RUBY_ENGINE == 'truffleruby'
# The pure-Ruby generator is faster on TruffleRuby, so skip compiling the generator extension
File.write('Makefile', dummy_makefile("").join)
else
append_cflags("-std=c99")
$defs << "-DJSON_GENERATOR"
if enable_config('generator-use-simd', default=!ENV["JSON_DISABLE_SIMD"])
if RbConfig::CONFIG['host_cpu'] =~ /^(arm.*|aarch64.*)/
# Try to compile a small program using NEON instructions
if have_header('arm_neon.h')
have_type('uint8x16_t', headers=['arm_neon.h']) && try_compile(<<~'SRC')
#include <arm_neon.h>
int main() {
uint8x16_t test = vdupq_n_u8(32);
return 0;
}
SRC
$defs.push("-DJSON_ENABLE_SIMD")
end
end
if have_header('x86intrin.h') && have_type('__m128i', headers=['x86intrin.h']) && try_compile(<<~'SRC')
#include <x86intrin.h>
int main() {
__m128i test = _mm_set1_epi8(32);
return 0;
}
SRC
$defs.push("-DJSON_ENABLE_SIMD")
end
have_header('cpuid.h')
end
create_makefile 'json/ext/generator'
end
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