[clang] [Clang][Hexagon] Use flat library directory layout for Picolibc (PR #201326)

[via cfe-commits]

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@@ -229,10 +244,58 @@
 // RUN:   -ccc-install-dir %S/Inputs/hexagon_tree/Tools/bin \
 // RUN:   -mcpu=hexagonv68 -### %s 2>&1 | FileCheck -check-prefix=CHECK-H2-LIBPATHS %s
 // CHECK-H2-LIBPATHS: "-L{{.*}}{{/|\\\\}}Inputs{{/|\\\\}}hexagon_tree{{/|\\\\}}Tools{{/|\\\\}}bin{{/|\\\\}}..{{/|\\\\}}target{{/|\\\\}}picolibc{{/|\\\\}}hexagon-unknown-h2-elf{{/|\\\\}}lib{{/|\\\\}}v68"
-// CHECK-H2-LIBPATHS-NOT: "-L{{.*}}{{/|\\\\}}Inputs{{/|\\\\}}hexagon_tree{{/|\\\\}}Tools{{/|\\\\}}bin{{/|\\\\}}..{{/|\\\\}}target{{/|\\\\}}picolibc{{/|\\\\}}hexagon-unknown-h2-elf{{/|\\\\}}lib{{/|\\\\}}v68{{/|\\\\}}G0"
+// CHECK-H2-LIBPATHS-NOT: "-L{{.*}}{{/|\\\\}}Inputs{{/|\\\\}}hexagon_tree{{/|\\\\}}Tools{{/|\\\\}}bin{{/|\\\\}}..{{/|\\\\}}target{{/|\\\\}}picolibc{{/|\\\\}}hexagon-unknown-h2-elf{{/|\\\\}}lib{{/|\\\\}}v68-G0"
 
 // RUN: %clang --target=hexagon-h2-elf --cstdlib=picolibc \
 // RUN:   -ccc-install-dir %S/Inputs/hexagon_tree/Tools/bin \
 // RUN:   -mcpu=hexagonv68 -G0 -### %s 2>&1 | FileCheck -check-prefix=CHECK-H2-LIBPATHS-G0 %s
-// CHECK-H2-LIBPATHS-G0: "-L{{.*}}{{/|\\\\}}Inputs{{/|\\\\}}hexagon_tree{{/|\\\\}}Tools{{/|\\\\}}bin{{/|\\\\}}..{{/|\\\\}}target{{/|\\\\}}picolibc{{/|\\\\}}hexagon-unknown-h2-elf{{/|\\\\}}lib{{/|\\\\}}v68{{/|\\\\}}G0"
+// CHECK-H2-LIBPATHS-G0: "-L{{.*}}{{/|\\\\}}Inputs{{/|\\\\}}hexagon_tree{{/|\\\\}}Tools{{/|\\\\}}bin{{/|\\\\}}..{{/|\\\\}}target{{/|\\\\}}picolibc{{/|\\\\}}hexagon-unknown-h2-elf{{/|\\\\}}lib{{/|\\\\}}v68-G0"
 // CHECK-H2-LIBPATHS-G0: "-L{{.*}}{{/|\\\\}}Inputs{{/|\\\\}}hexagon_tree{{/|\\\\}}Tools{{/|\\\\}}bin{{/|\\\\}}..{{/|\\\\}}target{{/|\\\\}}picolibc{{/|\\\\}}hexagon-unknown-h2-elf{{/|\\\\}}lib{{/|\\\\}}v68"
+
+// =============================================================================
+// --sysroot tests: verify includes, library paths, and start files when an
+// explicit sysroot is provided together with --cstdlib=picolibc.
+// The sysroot path is synthetic (/my/picolibc/sysroot); no real directory is
+// needed because the driver emits the paths unconditionally.
+// =============================================================================
+
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quic-k wrote:

added

https://github.com/llvm/llvm-project/pull/201326