[flang-commits] [flang] 75e7e7d - [flang] Add --gcc-toolchain and --gcc-install-dir options to flang. (#87360)
via flang-commits
flang-commits at lists.llvm.org
Thu Apr 4 15:02:11 PDT 2024
Author: Michael Kruse
Date: 2024-04-05T00:02:06+02:00
New Revision: 75e7e7d327e0458b151fbe1e6b3a9ac0a5081f76
URL: https://github.com/llvm/llvm-project/commit/75e7e7d327e0458b151fbe1e6b3a9ac0a5081f76
DIFF: https://github.com/llvm/llvm-project/commit/75e7e7d327e0458b151fbe1e6b3a9ac0a5081f76.diff
LOG: [flang] Add --gcc-toolchain and --gcc-install-dir options to flang. (#87360)
The `--gcc-toolchain` and `--gcc-install-dir` option were previously only visible to the Clang driver, but not Flang. These determine which assembler, linker, and libraries to use, e.g. for cross-compiling, and therefore are relevant for Flang as well.
Tests are implemented using a mock GCC installation in `basic_cross_linux_tree` copied over from Clang's tests. The Clang driver already contains tests with `--driver-mode=flang` but `flang-new` is an entirely different executable (containing the `-fc1` stage) that should be tested as well. While not all files in `basic_cross_linux_tree` are strictly needed for testing those two driver flags, they will be necessarily needed for future added flags such as `--rtlib`.
Also remove the entry `*.o` in flang's `.gitignore` since `crt*.o` files are needed in the GCC mock installation.
Fixes #86729
Added:
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-as
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.bfd
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.gold
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-as
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.bfd
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.gold
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/as
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.bfd
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.gold
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/lib/.keep
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0/crtbegin.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtbegin.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtbeginT.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtfastmath.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtbegin.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtbeginT.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtfastmath.o
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/as
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.bfd
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.gold
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.lld
flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/lib/.keep
flang/test/Driver/gcc-toolchain-install-dir.f90
Modified:
clang/include/clang/Driver/Options.td
flang/.gitignore
flang/test/Driver/driver-help-hidden.f90
flang/test/Driver/driver-help.f90
Removed:
################################################################################
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index c3e90a70925b78..12e8dc7912c3b8 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -802,9 +802,11 @@ def B : JoinedOrSeparate<["-"], "B">, MetaVarName<"<prefix>">,
HelpText<"Search $prefix$file for executables, libraries, and data files. "
"If $prefix is a directory, search $prefix/$file">;
def gcc_install_dir_EQ : Joined<["--"], "gcc-install-dir=">,
+ Visibility<[ClangOption, FlangOption]>,
HelpText<"Use GCC installation in the specified directory. The directory ends with path components like 'lib{,32,64}/gcc{,-cross}/$triple/$version'. "
"Note: executables (e.g. ld) used by the compiler are not overridden by the selected GCC installation">;
def gcc_toolchain : Joined<["--"], "gcc-toolchain=">, Flags<[NoXarchOption]>,
+ Visibility<[ClangOption, FlangOption]>,
HelpText<"Specify a directory where Clang can find 'include' and 'lib{,32,64}/gcc{,-cross}/$triple/$version'. "
"Clang will use the GCC installation with the largest version">;
def gcc_triple_EQ : Joined<["--"], "gcc-triple=">,
diff --git a/flang/.gitignore b/flang/.gitignore
index 4da4ee1178ba2c..508e70c1e1eaf1 100644
--- a/flang/.gitignore
+++ b/flang/.gitignore
@@ -5,7 +5,6 @@ build
root
tags
TAGS
-*.o
.nfs*
*.sw?
*~
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-as b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-as
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-as
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.bfd b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.bfd
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.bfd
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.gold b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.gold
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/i386-unknown-linux-gnu-ld.gold
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-as b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-as
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-as
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.bfd b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.bfd
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.bfd
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.gold b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.gold
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/bin/x86_64-unknown-linux-gnu-ld.gold
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/as b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/as
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/as
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.bfd b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.bfd
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.bfd
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.gold b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.gold
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/bin/ld.gold
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/lib/.keep b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/i386-unknown-linux-gnu/lib/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0/crtbegin.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0/crtbegin.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtbegin.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtbegin.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtbeginT.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtbeginT.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtfastmath.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/crtfastmath.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtbegin.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtbegin.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtbeginT.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtbeginT.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtfastmath.o b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/x32/crtfastmath.o
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/as b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/as
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/as
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.bfd b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.bfd
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.bfd
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.gold b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.gold
new file mode 100755
index 00000000000000..b23e55619b2ff0
--- /dev/null
+++ b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.gold
@@ -0,0 +1 @@
+#!/bin/true
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.lld b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/ld.lld
new file mode 100755
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/lib/.keep b/flang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/lib/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/flang/test/Driver/driver-help-hidden.f90 b/flang/test/Driver/driver-help-hidden.f90
index bf3660d57cbb4f..4405b64a8d0090 100644
--- a/flang/test/Driver/driver-help-hidden.f90
+++ b/flang/test/Driver/driver-help-hidden.f90
@@ -104,6 +104,9 @@
! CHECK-NEXT: -fversion-loops-for-stride
! CHECK-NEXT: Create unit-strided versions of loops
! CHECK-NEXT: -fxor-operator Enable .XOR. as a synonym of .NEQV.
+! CHECK-NEXT: --gcc-install-dir=<value>
+! CHECK-NEXT: Use GCC installation in the specified directory. The directory ends with path components like 'lib{,32,64}/gcc{,-cross}/$triple/$version'. Note: executables (e.g. ld) used by the compiler are not overridden by the selected GCC installation
+! CHECK-NEXT: --gcc-toolchain=<value> Specify a directory where Clang can find 'include' and 'lib{,32,64}/gcc{,-cross}/$triple/$version'. Clang will use the GCC installation with the largest version
! CHECK-NEXT: -gline-directives-only Emit debug line info directives only
! CHECK-NEXT: -gline-tables-only Emit debug line number tables only
! CHECK-NEXT: -gpulibc Link the LLVM C Library for GPUs
diff --git a/flang/test/Driver/driver-help.f90 b/flang/test/Driver/driver-help.f90
index b4280a454e3128..c80453f0ef21ba 100644
--- a/flang/test/Driver/driver-help.f90
+++ b/flang/test/Driver/driver-help.f90
@@ -92,6 +92,9 @@
! HELP-NEXT: -fversion-loops-for-stride
! HELP-NEXT: Create unit-strided versions of loops
! HELP-NEXT: -fxor-operator Enable .XOR. as a synonym of .NEQV.
+! HELP-NEXT: --gcc-install-dir=<value>
+! HELP-NEXT: Use GCC installation in the specified directory. The directory ends with path components like 'lib{,32,64}/gcc{,-cross}/$triple/$version'. Note: executables (e.g. ld) used by the compiler are not overridden by the selected GCC installation
+! HELP-NEXT: --gcc-toolchain=<value> Specify a directory where Clang can find 'include' and 'lib{,32,64}/gcc{,-cross}/$triple/$version'. Clang will use the GCC installation with the largest version
! HELP-NEXT: -gline-directives-only Emit debug line info directives only
! HELP-NEXT: -gline-tables-only Emit debug line number tables only
! HELP-NEXT: -gpulibc Link the LLVM C Library for GPUs
diff --git a/flang/test/Driver/gcc-toolchain-install-dir.f90 b/flang/test/Driver/gcc-toolchain-install-dir.f90
new file mode 100644
index 00000000000000..5a073b0c517122
--- /dev/null
+++ b/flang/test/Driver/gcc-toolchain-install-dir.f90
@@ -0,0 +1,21 @@
+!! Test that --gcc-toolchain and --gcc-install-dir options are working as expected.
+!! It does not test cross-compiling (--sysroot), so crtbegin.o, libgcc/compiler-rt, libc, libFortranRuntime, etc. are not supposed to be affected.
+!! PREFIX is captured twice because the driver escapes backslashes (occuring in Windows paths) in the -### output, but not on the "Selected GCC installation:" line.
+
+! RUN: %flang 2>&1 -### -v -o %t %s -no-integrated-as -fuse-ld=ld --target=i386-unknown-linux-gnu --gcc-install-dir=%S/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0 | FileCheck %s --check-prefix=CHECK-I386
+! RUN: %flang 2>&1 -### -v -o %t %s -no-integrated-as -fuse-ld=ld --target=i386-unknown-linux-gnu --gcc-toolchain=%S/Inputs/basic_cross_linux_tree/usr | FileCheck %s --check-prefix=CHECK-I386
+! CHECK-I386: Selected GCC installation: [[PREFIX:[^"]+]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0
+! CHECK-I386: "-fc1" "-triple" "i386-unknown-linux-gnu"
+! CHECK-I386: "[[PREFIX:[^"]+]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0/../../../../i386-unknown-linux-gnu/bin{{/|\\\\}}as"
+! CHECK-I386: "[[PREFIX]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0/../../../../i386-unknown-linux-gnu/bin{{/|\\\\}}ld" {{.*}} "-m" "elf_i386"
+! CHECK-I386-SAME: "-L[[PREFIX]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0"
+! CHECK-I386-SAME: "-L[[PREFIX]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/i386-unknown-linux-gnu/10.2.0/../../../../i386-unknown-linux-gnu/lib"
+
+! RUN: %flang 2>&1 -### -v -o %t %s -no-integrated-as -fuse-ld=ld --target=x86_64-unknown-linux-gnu --gcc-install-dir=%S/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0 | FileCheck %s --check-prefix=CHECK-X86-64
+! RUN: %flang 2>&1 -### -v -o %t %s -no-integrated-as -fuse-ld=ld --target=x86_64-unknown-linux-gnu --gcc-toolchain=%S/Inputs/basic_cross_linux_tree/usr | FileCheck %s --check-prefix=CHECK-X86-64
+! CHECK-X86-64: Selected GCC installation: [[PREFIX:[^"]+]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0
+! CHECK-X86-64: "-fc1" "-triple" "x86_64-unknown-linux-gnu"
+! CHECK-X86-64: "[[PREFIX:[^"]+]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/../../../../x86_64-unknown-linux-gnu/bin{{/|\\\\}}as" "--64"
+! CHECK-X86-64: "[[PREFIX]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/../../../../x86_64-unknown-linux-gnu/bin{{/|\\\\}}ld" {{.*}} "-m" "elf_x86_64"
+! CHECK-X86-64-SAME: "-L[[PREFIX]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0"
+! CHECK-X86-64-SAME: "-L[[PREFIX]]/Inputs/basic_cross_linux_tree/usr/lib/gcc/x86_64-unknown-linux-gnu/10.2.0/../../../../x86_64-unknown-linux-gnu/lib"
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