Can combine D and C++ in a single target. Closes #3125.

2 files changed, 12 insertions, 0 deletions

diff --git a/mesonbuild/compilers/compilers.py b/mesonbuild/compilers/compilers.py
index a2c6668..02faed2 100644
--- a/mesonbuild/compilers/compilers.py
+++ b/mesonbuild/compilers/compilers.py
@@ -938,6 +938,12 @@ class Compiler:
     def openmp_flags(self):
         raise EnvironmentException('Language %s does not support OpenMP flags.' % self.get_display_language())
 
+    def language_stdlib_only_link_flags(self):
+        # The linker flags needed to link the standard library of the current
+        # language in. This is needed in cases where you e.g. combine D and C++
+        # and both of which need to link their runtime library in or otherwise
+        # building fails with undefined symbols.
+        return []
 
 GCC_STANDARD = 0
 GCC_OSX = 1
diff --git a/mesonbuild/compilers/cpp.py b/mesonbuild/compilers/cpp.py
index 4c48052..051f922 100644
--- a/mesonbuild/compilers/cpp.py
+++ b/mesonbuild/compilers/cpp.py
@@ -93,6 +93,9 @@ class ClangCPPCompiler(ClangCompiler, CPPCompiler):
     def get_option_link_args(self, options):
         return []
 
+    def language_stdlib_only_link_flags(self):
+        return ['-lstdc++']
+
 
 class GnuCPPCompiler(GnuCompiler, CPPCompiler):
     def __init__(self, exelist, version, gcc_type, is_cross, exe_wrap, defines, **kwargs):
@@ -134,6 +137,9 @@ class GnuCPPCompiler(GnuCompiler, CPPCompiler):
     def get_pch_use_args(self, pch_dir, header):
         return ['-fpch-preprocess', '-include', os.path.basename(header)]
 
+    def language_stdlib_only_link_flags(self):
+        return ['-lstdc++']
+
 
 class ElbrusCPPCompiler(GnuCPPCompiler, ElbrusCompiler):
     def __init__(self, exelist, version, gcc_type, is_cross, exe_wrapper=None, defines=None, **kwargs):