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add an meson option to pass pari location #195

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add an meson option to pass pari location #195

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bb7d20e
add an meson option to pass pari location
dimpase Dec 13, 2025
d1f5142
this allows an external pari library, with LDFLAGS set
dimpase Dec 14, 2025
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17 changes: 14 additions & 3 deletions meson.build
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Original file line number Diff line number Diff line change
Expand Up @@ -55,22 +55,31 @@ if host_machine.system() == 'darwin'
endif
endif

pari_prefix = get_option('pari-prefix')
if pari_prefix != ''
pari_header_include_dirs += include_directories(pari_prefix + '/include')
pari_libpath = pari_prefix + '/lib'
pari_lib_dirs += [pari_libpath]
endif


# Explicitly check for header to give better error message (using -v to show search paths)
cc.has_header(
'pari/pari.h',
required: true,
args: ['-v'],
include_directories: pari_header_include_dirs,
)
pari = cc.find_library(
lpari = cc.find_library(
'pari',
has_headers: ['pari/pari.h'],
required: true,
dirs: pari_lib_dirs,
header_include_directories: pari_header_include_dirs,
)
pari = declare_dependency(include_directories: pari_header_include_dirs,
dependencies: [pari, gmp])
link_args: '-Wl,-rpath=' + pari_libpath + ' -L' + pari_libpath + ' -lpari',
dependencies: [lpari, gmp])

# Get PARI version (mostly as smoke test)
pari_version_code = '''
Expand All @@ -85,9 +94,11 @@ int main(void) {
return 0;
}
'''

pari_version = cc.run(
pari_version_code,
args: ['-v'],
args: ['-Wl,-rpath=' + pari_libpath + ' -L' + pari_libpath ],
# args: ['-v'],
name: 'pari version',
dependencies: [pari],
required: true,
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9 changes: 9 additions & 0 deletions meson.options
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
## Options for the Meson build system
# https://mesonbuild.com/Build-options.html

option(
'pari-prefix',
type: 'string',
value: '',
description: 'Path to a custom installation of pari-gp'
)
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