llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang

@llvm/pr-subscribers-flang-driver

Author: Tom Eccles (tblah)

<details>
<summary>Changes</summary>

So far as I can tell this option is driver-only so we can just re-use what 
already exists for clang. I've added a unit test based on clang's unit test to 
demonstrate that the option is handled.

Still TODO is to ensure that flang-rt is built with the same macos minimum 
version as compiler-rt. At the moment, setting the flang minimum version to 
older than the macos version on which flang was built will lead to link 
warnings because flangrt is built for version of macos on which flang was built 
rather than the oldest supported version (as compiler-rt is).

---
Full diff: https://github.com/llvm/llvm-project/pull/143508.diff


2 Files Affected:

- (modified) clang/include/clang/Driver/Options.td (+2) 
- (added) flang/test/Driver/darwin-version.f90 (+107) 


``````````diff
diff --git a/clang/include/clang/Driver/Options.td 
b/clang/include/clang/Driver/Options.td
index fd6deb22d404e..739a3fb0a4820 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -4927,8 +4927,10 @@ def ffuchsia_api_level_EQ : Joined<["-"], 
"ffuchsia-api-level=">,
   HelpText<"Set Fuchsia API level">,
   MarshallingInfoInt<LangOpts<"FuchsiaAPILevel">>;
 def mmacos_version_min_EQ : Joined<["-"], "mmacos-version-min=">,
+  Visibility<[ClangOption, CC1Option, FC1Option, FlangOption]>,
   Group<m_Group>, HelpText<"Set macOS deployment target">;
 def : Joined<["-"], "mmacosx-version-min=">,
+  Visibility<[ClangOption, CC1Option, FC1Option, FlangOption]>,
   Group<m_Group>, Alias<mmacos_version_min_EQ>;
 def mms_bitfields : Flag<["-"], "mms-bitfields">, Group<m_Group>,
   Visibility<[ClangOption, CC1Option]>,
diff --git a/flang/test/Driver/darwin-version.f90 
b/flang/test/Driver/darwin-version.f90
new file mode 100644
index 0000000000000..99d19ee44be9b
--- /dev/null
+++ b/flang/test/Driver/darwin-version.f90
@@ -0,0 +1,107 @@
+! Based on clang's darwin-version.c test with tests for ios watchos and tvos
+! removed
+
+! RUN: %flang -target i686-apple-darwin8 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX4 %s
+! RUN: %flang -target i686-apple-darwin9 -mmacos-version-min=10.4 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX4 %s
+! CHECK-VERSION-OSX4: "i686-apple-macosx10.4.0"
+! RUN: %flang -target i686-apple-darwin9 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX5 %s
+! RUN: %flang -target i686-apple-darwin9 -mmacos-version-min=10.5 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX5 %s
+! CHECK-VERSION-OSX5: "i686-apple-macosx10.5.0"
+! RUN: %flang -target i686-apple-darwin10 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX6 %s
+! RUN: %flang -target i686-apple-darwin9 -mmacos-version-min=10.6 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX6 %s
+! CHECK-VERSION-OSX6: "i686-apple-macosx10.6.0"
+! RUN: %flang -target x86_64-apple-darwin14 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX10 %s
+! RUN: %flang -target x86_64-apple-darwin -mmacos-version-min=10.10 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX10 %s
+! RUN: %flang -target x86_64-apple-darwin -mmacos-version-min=10.10 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX10 %s
+! CHECK-VERSION-OSX10: "x86_64-apple-macosx10.10.0"
+! RUN: not %flang -target x86_64-apple-darwin -mmacos-version-min= -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-MISSING %s
+! RUN: not %flang -target x86_64-apple-darwin -mmacos-version-min= -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-MISSING %s
+! CHECK-VERSION-MISSING: missing version number
+
+! RUN: %flang -target x86_64-apple-driverkit19.0 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-DRIVERKIT190 %s
+! CHECK-VERSION-DRIVERKIT190: "x86_64-apple-driverkit19.0.0"
+
+! Check environment variable gets interpreted correctly
+! RUN: env MACOSX_DEPLOYMENT_TARGET=10.5 IPHONEOS_DEPLOYMENT_TARGET=2.0 \
+! RUN:   %flang -target i686-apple-darwin9 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX5 %s
+
+! RUN: env MACOSX_DEPLOYMENT_TARGET=10.4.10 \
+! RUN:   %flang -target i386-apple-darwin9 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-OSX49 %s
+! CHECK-VERSION-OSX49: "i386-apple-macosx10.4.10"
+! RUN: env IPHONEOS_DEPLOYMENT_TARGET=2.3.1 \
+
+! Target can specify the OS version:
+
+! RUN: %flang -target x86_64-apple-macos10.11.2 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-TMAC2 %s
+! CHECK-VERSION-TMAC2: "x86_64-apple-macosx10.11.2"
+
+! Warn about -m<os>-version-min when it's used with target:
+
+! RUN: %flang -target x86_64-apple-macos10.11.2 -mmacos-version-min=10.6 -c %s 
-### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-TNO-OSV1 %s
+! CHECK-VERSION-TNO-OSV1: overriding '-mmacos-version-min=10.6' option with 
'-target x86_64-apple-macos10.11.2'
+
+! RUN: %flang -target x86_64-apple-macos10.6 -mmacos-version-min=10.6 -c %s 
-### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-TNO-SAME %s
+! CHECK-VERSION-TNO-SAME-NOT: overriding
+! CHECK-VERSION-TNO-SAME-NOT: argument unused during compilation
+
+! Target with OS version is not overridden by -m<os>-version-min variables:
+
+! RUN: %flang -target x86_64-apple-macos10.11.2 -mmacos-version-min=10.6 -c %s 
-### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-TIGNORE-OSV1 %s
+! CHECK-VERSION-TIGNORE-OSV1: "x86_64-apple-macosx10.11.2"
+
+! Target without OS version includes the OS given by -m<os>-version-min 
arguments:
+
+! RUN: %flang -target x86_64-apple-macos -mmacos-version-min=10.11 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-USE-OS-ARG1 %s
+! CHECK-VERSION-USE-OS-ARG1: "x86_64-apple-macosx10.11.0"
+
+! Target with OS version is not overridden by environment variables:
+
+! RUN: env MACOSX_DEPLOYMENT_TARGET=10.1 \
+! RUN:   %flang -target i386-apple-macos10.5 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-TMACOS-CMD %s
+! CHECK-VERSION-TMACOS-CMD: "i386-apple-macosx10.5.0"
+
+! Target with OS version is not overridden by arch:
+
+! RUN: %flang -target uknown-apple-macos10.11.2 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-VERSION-TIGNORE-ARCH1 %s
+! CHECK-VERSION-TIGNORE-ARCH1: "unknown-apple-macosx10.11.2"
+
+! Target can be used to specify the environment:
+
+! RUN: %flang -target x86_64-apple-macos11 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-MACOS11 %s
+! RUN: %flang -target x86_64-apple-darwin20 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-MACOS11 %s
+! RUN: %flang -target x86_64-apple-darwin -mmacos-version-min=11 -c %s -### 
2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-MACOS11 %s
+! CHECK-MACOS11: "x86_64-apple-macosx11.0.0"
+
+! RUN: %flang -target arm64-apple-macosx10.16 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-IMPLICIT-MACOS11 %s
+! CHECK-IMPLICIT-MACOS11: warning: overriding deployment version
+! CHECK-IMPLICIT-MACOS11: "arm64-apple-macosx11.0.0"
+
+! RUN: %flang -target arm64-apple-macos999 -c %s -### 2>&1 | \
+! RUN:   FileCheck --check-prefix=CHECK-MACOS999 %s
+
+! CHECK-MACOS999: "arm64-apple-macosx999.0.0"

``````````

</details>


https://github.com/llvm/llvm-project/pull/143508
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