MAINT: Cleanup makefile to meson for parallel opt

Needs some work

interface/meson.build

@@ -83,10 +83,6 @@ _static_libs += static_library(
     'rot.c',
     include_directories:  _inc,
     c_args: [_cargs,
-        '-DSMP_SERVER',
-        '-DNO_WARMUP',
-        '-DMAX_CPU_NUMBER=12',
-        '-DMAX_PARALLEL_NUMBER=1',
         '-DBUILD_SINGLE=1',
         '-DBUILD_DOUBLE=1',
         '-DBUILD_COMPLEX=1',
@@ -97,10 +93,8 @@ _static_libs += static_library(
         '-DCNAME=cblas_drot',
         '-DCHAR_NAME="cblas_drot_"',
         '-DCHAR_CNAME="cblas_drot"',
-        '-DNO_AFFINITY',
         '-DDOUBLE',
-        '-UCOMPLEX',
-        '-DCBLAS',],
+        '-UCOMPLEX',],
 )
 
 _interface = static_library('_interface',

kernel/meson.build

@@ -786,10 +786,6 @@ _configs = [
    'undef': ['COMPLEX', 'COMPLEX'],
    'def': ['DOUBLE'],
    'addl': [fma3_flag,
-        '-DSMP_SERVER',
-        '-DNO_WARMUP',
-        '-DMAX_CPU_NUMBER=12',
-        '-DMAX_PARALLEL_NUMBER=1',
         '-DBUILD_SINGLE=1',
         '-DBUILD_DOUBLE=1',
         '-DBUILD_COMPLEX=1',
@@ -800,10 +796,8 @@ _configs = [
         '-DCNAME=drot_k',
         '-DCHAR_NAME="drot_k_"',
         '-DCHAR_CNAME="drot_k"',
-        '-DNO_AFFINITY',
         '-DDOUBLE',
         '-UCOMPLEX',
-        '-DCBLAS',
            ]},
   # {'name': 'qrot_k',
   #  'undef': ['COMPLEX', 'COMPLEX'],

meson.build

@@ -201,9 +201,47 @@ add_project_arguments(simd_cargs, language: 'c')
 symnames = ['ASMNAME', 'ASMFNAME', 'NAME', 'CNAME', 'CHAR_NAME', 'CHAR_CNAME']
 
 # Other common options, move later
+# Undefine to help prevent clashes
 foreach symb : symnames
   _cargs += f'-U@symb@'
 endforeach
+# Based on options
+if not build_without_cblas
+  _cargs += '-DCBLAS'
+endif
+if no_affinity
+  _cargs += '-DNO_AFFINITY'
+endif
+if no_warmup
+  _cargs += '-DNO_WARMUP'
+endif
+# Parallel builds
+# TODO: This can be cleaned up significantly
+# Also use multiprocessing.cpu_count()
+# TODO: Handle SMP_SERVER
+num_parallel = get_option('num_parallel')
+if num_parallel > 1
+  _cargs += f'-DMAX_PARALLEL_NUMBER=@num_parallel@'
+endif
+num_cores = get_option('num_cores')
+if num_cores > 0
+  num_threads = num_cores
+else
+  num_threads = 0
+endif
+use_thread = false
+if num_threads > 2
+  use_thread = true
+endif
+if use_thread
+  message('Multi-threading enabled with ' + num_threads.to_string() + ' threads.')
+  _cargs += f'-DMAX_CPU_NUMBER=@num_threads@'
+  _cargs += f'-DSMP_SERVER'
+else
+  if get_option('use_locking')
+    _cargs += '-DUSE_LOCKING'
+  endif
+endif
 
 
 # Ignoring other hostarch checks and conflicts for arch in BSD for now

meson_options.txt

@@ -4,13 +4,21 @@ option('build_lapack_deprecated', type: 'boolean', value: true, description: 'Wh
 option('build_testing', type: 'boolean', value: true, description: 'Build LAPACK testsuite when building LAPACK')
 option('use_c_lapack', type: 'boolean', value: false, description: 'Build LAPACK from C sources instead of the original Fortran')
 option('build_without_cblas', type: 'boolean', value: false, description: 'Do not build the C interface (CBLAS) to the BLAS functions')
-option('use_locking', type: 'boolean', value: false, description: 'Use locks even in single-threaded builds to make them callable from multiple threads')
 option('use_perl', type: 'boolean', value: false, description: 'Use the older PERL scripts for build preparation instead of universal shell scripts')
 option('no_warmup', type: 'boolean', value: true, description: 'Do not run a benchmark on each startup just to find the best location for the memory buffer')
 option('no_affinity', type: 'boolean', value: true, description: 'Disable support for CPU affinity masks to avoid binding processes from e.g. R or numpy/scipy to a single core')
 option('build_cpp_thread_safety_test', type: 'boolean', value: false, description: 'Run a massively parallel DGEMM test to confirm thread safety of the library (requires OpenMP and about 1.3GB of RAM)')
 option('build_cpp_thread_safety_gemv', type: 'boolean', value: false, description: 'Run a massively parallel DGEMV test to confirm thread safety of the library (requires OpenMP)')
 option('build_static_libs', type: 'boolean', value: false, description: 'Build static library')
+# Parallel options
+option('num_cores', type: 'integer',
+       min: 1, value: 1, description: 'Number of CPUs')
+option('num_parallel', type: 'integer',
+       min: 1, value: 1, description: 'Max CPU')
+option('num_threads', type: 'integer',
+       min: 1, value: 12, description: 'Max threads')
+option('use_locking', type: 'boolean', value: false,
+       description: 'Use locks even in single-threaded builds to make them callable from multiple threads')
 
 # From Makefile
 option('dynamic_arch', type: 'boolean', value: false, description: 'Include support for multiple CPU targets, with automatic selection at runtime (x86/x86_64, aarch64 or ppc only)')