Merge topic 'env-init-configs' into release-3.22 5b1ed2a646 try_compile: Do not use CMAKE_BUILD_TYPE or CMAKE_CONFIGURATION_TYPES env vars Acked-by: Kitware Robot <kwrobot@kitware.com> Acked-by: buildbot <buildbot@kitware.com> Merge-request: !6755

diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 9914902..97ad7ab 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx

@@ -498,7 +498,8 @@
 void cmGlobalGenerator::EnableLanguage(
   std::vector<std::string> const& languages, cmMakefile* mf, bool optional)
 {
-  if (!this->IsMultiConfig()) {
+  if (!this->IsMultiConfig() &&
+      !this->GetCMakeInstance()->GetIsInTryCompile()) {
     std::string envBuildType;
     if (!mf->GetDefinition("CMAKE_BUILD_TYPE") &&
         cmSystemTools::GetEnv("CMAKE_BUILD_TYPE", envBuildType)) {

diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 83984f7..88f3cc7 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx

@@ -3167,7 +3167,8 @@
     return;
   }
   std::string initConfigs;
-  if (!cmSystemTools::GetEnv("CMAKE_CONFIGURATION_TYPES", initConfigs)) {
+  if (this->GetCMakeInstance()->GetIsInTryCompile() ||
+      !cmSystemTools::GetEnv("CMAKE_CONFIGURATION_TYPES", initConfigs)) {
     initConfigs = genDefault;
   }
   this->AddCacheDefinition(

diff --git a/Tests/RunCMake/try_compile/EnvConfig.c b/Tests/RunCMake/try_compile/EnvConfig.c
new file mode 100644
index 0000000..5b1d400
--- /dev/null
+++ b/Tests/RunCMake/try_compile/EnvConfig.c

@@ -0,0 +1,7 @@
+#ifdef TC_CONFIG_BAD
+#  error "Built in 'Bad' config"
+#endif
+int main(void)
+{
+  return 0;
+}

diff --git a/Tests/RunCMake/try_compile/EnvConfig.cmake b/Tests/RunCMake/try_compile/EnvConfig.cmake
new file mode 100644
index 0000000..4040c59
--- /dev/null
+++ b/Tests/RunCMake/try_compile/EnvConfig.cmake

@@ -0,0 +1,18 @@
+enable_language(C)
+
+set(ENV{CMAKE_BUILD_TYPE} "Bad")
+set(ENV{CMAKE_CONFIGURATION_TYPES} "Bad;Debug")
+
+add_library(tc_defs INTERFACE IMPORTED)
+target_compile_definitions(tc_defs INTERFACE "TC_CONFIG_$<UPPER_CASE:$<CONFIG>>")
+
+try_compile(ENV_CONFIG_RESULT "${CMAKE_BINARY_DIR}"
+  SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/EnvConfig.c"
+  COPY_FILE "${CMAKE_CURRENT_BINARY_DIR}/EnvConfig.bin"
+  OUTPUT_VARIABLE tc_output
+  LINK_LIBRARIES tc_defs
+  )
+if(NOT ENV_CONFIG_RESULT)
+  string(REPLACE "\n" "\n  " tc_output "  ${tc_output}")
+  message(FATAL_ERROR "try_compile failed:\n${tc_output}")
+endif()

diff --git a/Tests/RunCMake/try_compile/RunCMakeTest.cmake b/Tests/RunCMake/try_compile/RunCMakeTest.cmake
index fffb038..b19fd0e 100644
--- a/Tests/RunCMake/try_compile/RunCMakeTest.cmake
+++ b/Tests/RunCMake/try_compile/RunCMakeTest.cmake

@@ -16,6 +16,8 @@
 run_cmake(NonSourceCopyFile)
 run_cmake(NonSourceCompileDefinitions)
 
+run_cmake(EnvConfig)
+
 set(RunCMake_TEST_OPTIONS --debug-trycompile)
 run_cmake(PlatformVariables)
 run_cmake(WarnDeprecated)