diff --git a/clang/include/clang/Basic/DiagnosticDriverKinds.td b/clang/include/clang/Basic/DiagnosticDriverKinds.td
index 20fb47237c56f..377509cfcf2cd 100644
--- a/clang/include/clang/Basic/DiagnosticDriverKinds.td
+++ b/clang/include/clang/Basic/DiagnosticDriverKinds.td
@@ -520,6 +520,9 @@ def warn_drv_math_errno_enabled_after_veclib: Warning<
   "math errno enabled by '%0' after it was implicitly disabled by '%1',"
   " this may limit the utilization of the vector library">,
   InGroup<MathErrnoEnabledWithVecLib>;
+def warn_drv_gcc_incompatible_complex_range_override: Warning<
+  "combination of '%0' and '%1' results in complex number calculations incompatible with GCC">,
+  InGroup<GccCompat>;
 
 def note_drv_command_failed_diag_msg : Note<
   "diagnostic msg: %0">;
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 1d11be1d82be8..244c4c0848aa6 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -2915,6 +2915,11 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
       } else {
         if (GccRangeComplexOption != "-fno-cx-limited-range")
           EmitComplexRangeDiag(D, GccRangeComplexOption, "-fcx-limited-range");
+        // Warn about complex range option overrides incompatible with GCC.
+        if (GccRangeComplexOption == "-fcx-fortran-rules" ||
+            GccRangeComplexOption == "-fno-cx-fortran-rules")
+          D.Diag(clang::diag::warn_drv_gcc_incompatible_complex_range_override)
+              << GccRangeComplexOption << A->getSpelling();
       }
       GccRangeComplexOption = "-fcx-limited-range";
       LastComplexRangeOption = A->getSpelling();
@@ -2929,6 +2934,10 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
             GccRangeComplexOption != "-fno-cx-fortran-rules")
           EmitComplexRangeDiag(D, GccRangeComplexOption,
                                "-fno-cx-limited-range");
+        // Warn about complex range option overrides incompatible with GCC.
+        if (GccRangeComplexOption == "-fcx-fortran-rules")
+          D.Diag(clang::diag::warn_drv_gcc_incompatible_complex_range_override)
+              << GccRangeComplexOption << A->getSpelling();
       }
       GccRangeComplexOption = "-fno-cx-limited-range";
       LastComplexRangeOption = A->getSpelling();
@@ -3231,6 +3240,11 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
     case options::OPT_ffast_math:
       applyFastMath(true);
       LastComplexRangeOption = A->getSpelling();
+      // Warn about complex range option overrides incompatible with GCC.
+      if (GccRangeComplexOption == "-fcx-fortran-rules" ||
+          GccRangeComplexOption == "-fno-cx-fortran-rules")
+        D.Diag(clang::diag::warn_drv_gcc_incompatible_complex_range_override)
+            << GccRangeComplexOption << A->getSpelling();
       if (A->getOption().getID() == options::OPT_Ofast)
         LastFpContractOverrideOption = "-Ofast";
       else
@@ -3255,6 +3269,11 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D,
           Range != LangOptions::ComplexRangeKind::CX_Full)
         EmitComplexRangeDiag(D, LastComplexRangeOption, "-fno-fast-math");
       Range = LangOptions::ComplexRangeKind::CX_None;
+      // Warn about complex range option overrides incompatible with GCC.
+      if (GccRangeComplexOption == "-fcx-fortran-rules" ||
+          GccRangeComplexOption == "-fcx-limited-range")
+        D.Diag(clang::diag::warn_drv_gcc_incompatible_complex_range_override)
+            << GccRangeComplexOption << A->getSpelling();
       LastComplexRangeOption = "";
       GccRangeComplexOption = "";
       LastFpContractOverrideOption = "";
diff --git a/clang/test/Driver/range.c b/clang/test/Driver/range.c
index 30140f3c208e0..d86bec46589a1 100644
--- a/clang/test/Driver/range.c
+++ b/clang/test/Driver/range.c
@@ -255,6 +255,31 @@
 // RUN: %clang -### -Werror --target=x86_64 -fno-fast-math -ffp-model=strict \
 // RUN:   -c %s 2>&1 | FileCheck --check-prefixes=FULL %s
 
+
+// Test incompatibility of complex range override with GCC 14.2.0.
+
+// RUN: %clang -### --target=x86_64 -fcx-limited-range -fno-fast-math \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT1 %s
+
+// RUN: %clang -### --target=x86_64 -fcx-fortran-rules -fcx-limited-range \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT2 %s
+
+// RUN: %clang -### --target=x86_64 -fcx-fortran-rules -fno-cx-limited-range \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT3 %s
+
+// RUN: %clang -### --target=x86_64 -fcx-fortran-rules -ffast-math \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT4 %s
+
+// RUN: %clang -### --target=x86_64 -fcx-fortran-rules -fno-fast-math \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT5 %s
+
+// RUN: %clang -### --target=x86_64 -fno-cx-fortran-rules -fcx-limited-range \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT6 %s
+
+// RUN: %clang -### --target=x86_64 -fno-cx-fortran-rules -ffast-math \
+// RUN:   -c %s 2>&1 | FileCheck --check-prefixes=WARN_INCOMPAT7 %s
+
+
 // WARN1: warning: overriding '-fcx-limited-range' option with '-fcx-fortran-rules' [-Woverriding-option]
 // WARN2: warning: overriding '-fno-cx-limited-range' option with '-fcx-fortran-rules' [-Woverriding-option]
 // WARN3: warning: overriding '-fcx-fortran-rules' option with '-fno-cx-limited-range' [-Woverriding-option]
@@ -281,4 +306,12 @@
 // CHECK-NOT: -complex-range=improved
 // RANGE-NOT: -complex-range=
 
+// WARN_INCOMPAT1: warning: combination of '-fcx-limited-range' and '-fno-fast-math' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+// WARN_INCOMPAT2: warning: combination of '-fcx-fortran-rules' and '-fcx-limited-range' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+// WARN_INCOMPAT3: warning: combination of '-fcx-fortran-rules' and '-fno-cx-limited-range' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+// WARN_INCOMPAT4: warning: combination of '-fcx-fortran-rules' and '-ffast-math' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+// WARN_INCOMPAT5: warning: combination of '-fcx-fortran-rules' and '-fno-fast-math' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+// WARN_INCOMPAT6: warning: combination of '-fno-cx-fortran-rules' and '-fcx-limited-range' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+// WARN_INCOMPAT7: warning: combination of '-fno-cx-fortran-rules' and '-ffast-math' results in complex number calculations incompatible with GCC [-Wgcc-compat]
+
 // ERR: error: unsupported argument 'foo' to option '-fcomplex-arithmetic='