[clang] [Driver] Also respect SysRoot for the system library paths on DragonFly (PR #66056)

[Brad Smith via cfe-commits]

https://github.com/brad0 updated https://github.com/llvm/llvm-project/pull/66056:

>From 91ee01975c2c59b6349ee4ac310ee7b2c3dfe7af Mon Sep 17 00:00:00 2001
From: Brad Smith <brad at comstyle.com>
Date: Tue, 12 Sep 2023 04:43:49 -0400
Subject: [PATCH] [Driver] Also respect SysRoot for the system library paths on
 DragonFly

---
 clang/lib/Driver/ToolChains/DragonFly.cpp         |  8 +++++---
 .../Inputs/basic_dragonfly_tree/usr/lib/crt1.o    |  0
 .../Inputs/basic_dragonfly_tree/usr/lib/crti.o    |  0
 .../Inputs/basic_dragonfly_tree/usr/lib/crtn.o    |  0
 .../basic_dragonfly_tree/usr/lib/gcc80/crtbegin.o |  0
 .../usr/lib/gcc80/crtbeginS.o                     |  0
 .../basic_dragonfly_tree/usr/lib/gcc80/crtend.o   |  0
 .../basic_dragonfly_tree/usr/lib/gcc80/crtendS.o  |  0
 clang/test/Driver/dragonfly.c                     | 15 +++++++++++++++
 9 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crt1.o
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crti.o
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crtn.o
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtbegin.o
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtbeginS.o
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtend.o
 create mode 100644 clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtendS.o

diff --git a/clang/lib/Driver/ToolChains/DragonFly.cpp b/clang/lib/Driver/ToolChains/DragonFly.cpp
index 46f98f9efca2330..82c975990a32511 100644
--- a/clang/lib/Driver/ToolChains/DragonFly.cpp
+++ b/clang/lib/Driver/ToolChains/DragonFly.cpp
@@ -123,7 +123,9 @@ void dragonfly::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
                    options::OPT_r)) {
-    CmdArgs.push_back("-L/usr/lib/gcc80");
+    SmallString<128> Dir(D.SysRoot);
+    llvm::sys::path::append(Dir, "/usr/lib/gcc80");
+    CmdArgs.push_back(Args.MakeArgString("-L" + Dir));
 
     if (!Args.hasArg(options::OPT_static)) {
       CmdArgs.push_back("-rpath");
@@ -192,8 +194,8 @@ DragonFly::DragonFly(const Driver &D, const llvm::Triple &Triple,
     getProgramPaths().push_back(getDriver().Dir);
 
   getFilePaths().push_back(getDriver().Dir + "/../lib");
-  getFilePaths().push_back("/usr/lib");
-  getFilePaths().push_back("/usr/lib/gcc80");
+  getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib"));
+  getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/gcc80"));
 }
 
 void DragonFly::AddClangSystemIncludeArgs(
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crt1.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crt1.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crti.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crti.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crtn.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/crtn.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtbegin.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtbegin.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtbeginS.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtbeginS.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtend.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtend.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtendS.o b/clang/test/Driver/Inputs/basic_dragonfly_tree/usr/lib/gcc80/crtendS.o
new file mode 100644
index 000000000000000..e69de29bb2d1d64
diff --git a/clang/test/Driver/dragonfly.c b/clang/test/Driver/dragonfly.c
index 477dbfe6abf43fa..8ba13c41d632c20 100644
--- a/clang/test/Driver/dragonfly.c
+++ b/clang/test/Driver/dragonfly.c
@@ -4,6 +4,21 @@
 // CHECK: "-cc1" "-triple" "x86_64-pc-dragonfly"
 // CHECK: ld{{.*}}" "--eh-frame-hdr" "-dynamic-linker" "/usr/libexec/ld-elf.so.{{.*}}" "--hash-style=gnu" "--enable-new-dtags" "-o" "a.out" "{{.*}}crt1.o" "{{.*}}crti.o" "{{.*}}crtbegin.o" "{{.*}}.o" "-L{{.*}}gcc{{.*}}" "-rpath" "{{.*}}gcc{{.*}}" "-lc" "-lgcc" "{{.*}}crtend.o" "{{.*}}crtn.o"
 
+// Check x86_64-unknown-dragonfly, X86_64
+// RUN: %clang -### %s 2>&1 --target=x86_64-unknown-dragonfly \
+// RUN:     --gcc-toolchain="" \
+// RUN:     --sysroot=%S/Inputs/basic_dragonfly_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-X86_64 %s
+// CHECK-LD-X86_64: "-cc1" "-triple" "x86_64-unknown-dragonfly"
+// CHECK-LD-X86_64-SAME: "-isysroot" "[[SYSROOT:[^"]+]]"
+// CHECK-LD-X86_64: "{{.*}}ld{{(.exe)?}}"
+// CHECK-LD-X86_64-SAME: "[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}crt1.o"
+// CHECK-LD-X86_64-SAME: "[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}crti.o"
+// CHECK-LD-X86_64-SAME: "[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}gcc80{{/|\\\\}}crtbegin.o"
+// CHECK-LD-X86_64-SAME: "-L[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}gcc80" "-rpath" "/usr/lib/gcc80" "-lc" "-lgcc" "--as-needed" "-lgcc_pic" "--no-as-needed"
+// CHECK-LD-X86_64-SAME: "[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}gcc80{{/|\\\\}}crtend.o"
+// CHECK-LD-X86_64-SAME: "[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}crtn.o"
+
 // -r suppresses -dynamic-linker, default -l and crt*.o like -nostdlib.
 // RUN: %clang -### %s --target=x86_64-pc-dragonfly -r \
 // RUN:   2>&1 | FileCheck %s --check-prefix=RELOCATABLE