linkers: delay implementations import until detect is run

This saves on a 1500-line import at startup and may be skipped entirely
if no compiled languages are used. In exchange, we move the
implementation to a new file that is imported instead.

Followup to commit ab20eb5bbc21ae855bcd211131132d2778602bcf.

1 files changed, 4 insertions, 3 deletions

diff --git a/unittests/internaltests.py b/unittests/internaltests.py
index 6f04d9415..f22adb2f9 100644
--- a/unittests/internaltests.py
+++ b/unittests/internaltests.py
@@ -38,6 +38,7 @@ from mesonbuild import coredata
 from mesonbuild.compilers.c import ClangCCompiler, GnuCCompiler
 from mesonbuild.compilers.cpp import VisualStudioCPPCompiler
 from mesonbuild.compilers.d import DmdDCompiler
+from mesonbuild.linkers import linkers
 from mesonbuild.interpreterbase import typed_pos_args, InvalidArguments, ObjectHolder
 from mesonbuild.interpreterbase import typed_pos_args, InvalidArguments, typed_kwargs, ContainerTypeInfo, KwargInfo
 from mesonbuild.mesonlib import (
@@ -223,7 +224,7 @@ class InternalTests(unittest.TestCase):
 
 
     def test_compiler_args_class_visualstudio(self):
-        linker = mesonbuild.linkers.MSVCDynamicLinker(MachineChoice.HOST, [])
+        linker = linkers.MSVCDynamicLinker(MachineChoice.HOST, [])
         # Version just needs to be > 19.0.0
         cc = VisualStudioCPPCompiler([], [], '20.00', MachineChoice.HOST, False, mock.Mock(), 'x64', linker=linker)
 
@@ -245,7 +246,7 @@ class InternalTests(unittest.TestCase):
 
     def test_compiler_args_class_gnuld(self):
         ## Test --start/end-group
-        linker = mesonbuild.linkers.GnuBFDDynamicLinker([], MachineChoice.HOST, '-Wl,', [])
+        linker = linkers.GnuBFDDynamicLinker([], MachineChoice.HOST, '-Wl,', [])
         gcc = GnuCCompiler([], [], 'fake', False, MachineChoice.HOST, mock.Mock(), linker=linker)
         ## Ensure that the fake compiler is never called by overriding the relevant function
         gcc.get_default_include_dirs = lambda: ['/usr/include', '/usr/share/include', '/usr/local/include']
@@ -273,7 +274,7 @@ class InternalTests(unittest.TestCase):
 
     def test_compiler_args_remove_system(self):
         ## Test --start/end-group
-        linker = mesonbuild.linkers.GnuBFDDynamicLinker([], MachineChoice.HOST, '-Wl,', [])
+        linker = linkers.GnuBFDDynamicLinker([], MachineChoice.HOST, '-Wl,', [])
         gcc = GnuCCompiler([], [], 'fake', False, MachineChoice.HOST, mock.Mock(), linker=linker)
         ## Ensure that the fake compiler is never called by overriding the relevant function
         gcc.get_default_include_dirs = lambda: ['/usr/include', '/usr/share/include', '/usr/local/include']