Fix some BSD builds missing pthread functions

packaging/dependencies.nix

@@ -61,6 +61,12 @@ let
       workDir = null;
     };
 
+  # Work around weird `--as-needed` linker behavior with BSD, see
+  # https://github.com/mesonbuild/meson/issues/3593
+  bsdNoLinkAsNeeded = finalAttrs: prevAttrs: lib.optionalAttrs stdenv.hostPlatform.isBSD {
+    mesonFlags = [ (lib.mesonBool "b_asneeded" false) ] ++ prevAttrs.mesonFlags or [];
+  };
+
 in
 scope: {
   inherit stdenv versionSuffix;
@@ -130,5 +136,8 @@ scope: {
 
   inherit resolvePath filesetToSource;
 
-  mkMesonDerivation = f: stdenv.mkDerivation (lib.extends localSourceLayer f);
+  mkMesonDerivation = f: stdenv.mkDerivation
+    (lib.extends
+      (lib.composeExtensions bsdNoLinkAsNeeded localSourceLayer)
+      f);
 }

src/libcmd/meson.build

@@ -30,6 +30,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 nlohmann_json = dependency('nlohmann_json', version : '>= 3.9')
 deps_public += nlohmann_json
 

src/libexpr-c/meson.build

@@ -29,6 +29,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 # TODO rename, because it will conflict with downstream projects
 configdata.set_quoted('PACKAGE_VERSION', meson.project_version())
 

src/libfetchers/meson.build

@@ -26,6 +26,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 nlohmann_json = dependency('nlohmann_json', version : '>= 3.9')
 deps_public += nlohmann_json
 

src/libflake/meson.build

@@ -26,6 +26,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 nlohmann_json = dependency('nlohmann_json', version : '>= 3.9')
 deps_public += nlohmann_json
 

src/libmain-c/meson.build

@@ -29,6 +29,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 # TODO rename, because it will conflict with downstream projects
 configdata.set_quoted('PACKAGE_VERSION', meson.project_version())
 

src/libmain/meson.build

@@ -26,6 +26,7 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
 
 pubsetbuf_test = '''
 #include <iostream>

src/libstore-c/meson.build

@@ -27,6 +27,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 # TODO rename, because it will conflict with downstream projects
 configdata.set_quoted('PACKAGE_VERSION', meson.project_version())
 

src/libutil-c/meson.build

@@ -25,6 +25,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 # TODO rename, because it will conflict with downstream projects
 configdata.set_quoted('PACKAGE_VERSION', meson.project_version())
 

src/nix/meson.build

@@ -28,6 +28,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 subdir('build-utils-meson/export-all-symbols')
 
 add_project_arguments(

tests/unit/libexpr-support/meson.build

@@ -27,6 +27,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 rapidcheck = dependency('rapidcheck')
 deps_public += rapidcheck
 

tests/unit/libexpr/meson.build

@@ -25,6 +25,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 subdir('build-utils-meson/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')

tests/unit/libfetchers/meson.build

@@ -24,6 +24,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 subdir('build-utils-meson/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')

tests/unit/libflake/meson.build

@@ -24,6 +24,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 subdir('build-utils-meson/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')

tests/unit/libstore-support/meson.build

@@ -25,6 +25,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 rapidcheck = dependency('rapidcheck')
 deps_public += rapidcheck
 

tests/unit/libstore/meson.build

@@ -25,6 +25,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 subdir('build-utils-meson/export-all-symbols')
 
 sqlite = dependency('sqlite3', 'sqlite', version : '>=3.6.19')

tests/unit/libutil-support/meson.build

@@ -23,6 +23,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 rapidcheck = dependency('rapidcheck')
 deps_public += rapidcheck
 

tests/unit/libutil/meson.build

@@ -25,6 +25,8 @@ deps_public_maybe_subproject = [
 ]
 subdir('build-utils-meson/subprojects')
 
+subdir('build-utils-meson/threads')
+
 subdir('build-utils-meson/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')