[flang-commits] [clang] [flang] [driver] Generalize the code that adds the path of libflang_rt.runtime.a. (PR #134362)
Daniel Chen via flang-commits
flang-commits at lists.llvm.org
Sun Apr 6 18:15:58 PDT 2025
https://github.com/DanielCChen updated https://github.com/llvm/llvm-project/pull/134362
>From cd100a70479adbb4619d685e345485eea99987c5 Mon Sep 17 00:00:00 2001
From: Daniel Chen <cdchen at ca.ibm.com>
Date: Fri, 4 Apr 2025 06:10:56 -0400
Subject: [PATCH 1/2] [driver] Generalize adding the path of
libflang_rt.runtime.a.
---
clang/include/clang/Driver/ToolChain.h | 4 ++++
clang/lib/Driver/ToolChain.cpp | 20 ++++++++++++++++++--
clang/lib/Driver/ToolChains/AIX.cpp | 8 --------
clang/lib/Driver/ToolChains/AIX.h | 3 ---
clang/lib/Driver/ToolChains/PPCLinux.cpp | 16 ----------------
clang/lib/Driver/ToolChains/PPCLinux.h | 3 ---
flang/test/Driver/linker-flags.f90 | 2 +-
7 files changed, 23 insertions(+), 33 deletions(-)
diff --git a/clang/include/clang/Driver/ToolChain.h b/clang/include/clang/Driver/ToolChain.h
index 076e4296c3090..d0059673d6a67 100644
--- a/clang/include/clang/Driver/ToolChain.h
+++ b/clang/include/clang/Driver/ToolChain.h
@@ -521,6 +521,10 @@ class ToolChain {
addFortranRuntimeLibraryPath(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) const;
+ /// Add the path for libflang_rt.runtime.a
+ void addFlangRTLibPath(const llvm::opt::ArgList &Args,
+ llvm::opt::ArgStringList &CmdArgs) const;
+
const char *getCompilerRTArgString(const llvm::opt::ArgList &Args,
StringRef Component,
FileType Type = ToolChain::FT_Static,
diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index 36d0ae34dec86..054618a44d7bc 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -816,8 +816,7 @@ void ToolChain::addFortranRuntimeLibs(const ArgList &Args,
if (AsNeeded)
addAsNeededOption(*this, Args, CmdArgs, /*as_needed=*/false);
}
- CmdArgs.push_back("-lflang_rt.runtime");
- addArchSpecificRPath(*this, Args, CmdArgs);
+ addFlangRTLibPath(Args, CmdArgs);
// needs libexecinfo for backtrace functions
if (getTriple().isOSFreeBSD() || getTriple().isOSNetBSD() ||
@@ -850,6 +849,23 @@ void ToolChain::addFortranRuntimeLibraryPath(const llvm::opt::ArgList &Args,
CmdArgs.push_back(Args.MakeArgString("-L" + DefaultLibPath));
}
+void ToolChain::addFlangRTLibPath(const ArgList &Args,
+ llvm::opt::ArgStringList &CmdArgs) const {
+ // Link static flang_rt.runtime.a or shared flang_rt.runtime.so
+ const char *Path;
+ if (getVFS().exists(Twine(Path = getCompilerRTArgString(
+ Args, "runtime", ToolChain::FT_Static, true))))
+ CmdArgs.push_back(Path);
+ else if (getVFS().exists(
+ Twine(Path = getCompilerRTArgString(
+ Args, "runtime", ToolChain::FT_Shared, true))))
+ CmdArgs.push_back(Path);
+ else {
+ CmdArgs.push_back("-lflang_rt.runtime");
+ addArchSpecificRPath(*this, Args, CmdArgs);
+ }
+}
+
// Android target triples contain a target version. If we don't have libraries
// for the exact target version, we should fall back to the next newest version
// or a versionless path, if any.
diff --git a/clang/lib/Driver/ToolChains/AIX.cpp b/clang/lib/Driver/ToolChains/AIX.cpp
index 26b9d4c772be6..5dc80bc5a3d25 100644
--- a/clang/lib/Driver/ToolChains/AIX.cpp
+++ b/clang/lib/Driver/ToolChains/AIX.cpp
@@ -608,14 +608,6 @@ void AIX::addProfileRTLibs(const llvm::opt::ArgList &Args,
ToolChain::addProfileRTLibs(Args, CmdArgs);
}
-void AIX::addFortranRuntimeLibs(const ArgList &Args,
- llvm::opt::ArgStringList &CmdArgs) const {
- // Link flang_rt.runtime.a. On AIX, the static and shared library are all
- // named .a
- CmdArgs.push_back(
- getCompilerRTArgString(Args, "runtime", ToolChain::FT_Static, true));
-}
-
ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const {
return ToolChain::CST_Libcxx;
}
diff --git a/clang/lib/Driver/ToolChains/AIX.h b/clang/lib/Driver/ToolChains/AIX.h
index 17e8370cd1218..8f130f6b54547 100644
--- a/clang/lib/Driver/ToolChains/AIX.h
+++ b/clang/lib/Driver/ToolChains/AIX.h
@@ -87,9 +87,6 @@ class LLVM_LIBRARY_VISIBILITY AIX : public ToolChain {
void addProfileRTLibs(const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) const override;
- void addFortranRuntimeLibs(const llvm::opt::ArgList &Args,
- llvm::opt::ArgStringList &CmdArgs) const override;
-
CXXStdlibType GetDefaultCXXStdlibType() const override;
RuntimeLibType GetDefaultRuntimeLibType() const override;
diff --git a/clang/lib/Driver/ToolChains/PPCLinux.cpp b/clang/lib/Driver/ToolChains/PPCLinux.cpp
index 575e88c6ab124..0ed0f91ad166c 100644
--- a/clang/lib/Driver/ToolChains/PPCLinux.cpp
+++ b/clang/lib/Driver/ToolChains/PPCLinux.cpp
@@ -12,7 +12,6 @@
#include "clang/Driver/Options.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
-#include "llvm/Support/VirtualFileSystem.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
@@ -102,18 +101,3 @@ bool PPCLinuxToolChain::SupportIEEEFloat128(
return GlibcSupportsFloat128((Twine(D.DyldPrefix) + Linker).str()) &&
!(D.CCCIsCXX() && HasUnsupportedCXXLib);
}
-
-void PPCLinuxToolChain::addFortranRuntimeLibs(
- const ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const {
- // Link static flang_rt.runtime.a or shared flang_rt.runtime.so
- const char *Path;
- if (getVFS().exists(Twine(Path = getCompilerRTArgString(
- Args, "runtime", ToolChain::FT_Static, true))))
- CmdArgs.push_back(Path);
- else if (getVFS().exists(
- Twine(Path = getCompilerRTArgString(
- Args, "runtime", ToolChain::FT_Shared, true))))
- CmdArgs.push_back(Path);
- else
- CmdArgs.push_back("-lflang_rt.runtime");
-}
diff --git a/clang/lib/Driver/ToolChains/PPCLinux.h b/clang/lib/Driver/ToolChains/PPCLinux.h
index 910df3d16e6a5..63adaff6be9c2 100644
--- a/clang/lib/Driver/ToolChains/PPCLinux.h
+++ b/clang/lib/Driver/ToolChains/PPCLinux.h
@@ -24,9 +24,6 @@ class LLVM_LIBRARY_VISIBILITY PPCLinuxToolChain : public Linux {
AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const override;
- void addFortranRuntimeLibs(const llvm::opt::ArgList &Args,
- llvm::opt::ArgStringList &CmdArgs) const override;
-
private:
bool SupportIEEEFloat128(const Driver &D, const llvm::Triple &Triple,
const llvm::opt::ArgList &Args) const;
diff --git a/flang/test/Driver/linker-flags.f90 b/flang/test/Driver/linker-flags.f90
index 20104276d2e4a..4e62a8c32d360 100644
--- a/flang/test/Driver/linker-flags.f90
+++ b/flang/test/Driver/linker-flags.f90
@@ -2,7 +2,7 @@
! invocation. These libraries are added on top of other standard runtime
! libraries that the Clang driver will include.
-! RUN: %flang -### --target=ppc64le-linux-gnu %S/Inputs/hello.f90 2>&1 | FileCheck %s --check-prefixes=CHECK,UNIX,UNIX-F128NONE
+! RUN: %flang -### --target=ppc64le-linux-gnu %S/Inputs/hello.f90 2>&1 | FileCheck %s --check-prefixes=CHECK,UNIX,UNIX-F128%f128-lib
! RUN: %flang -### --target=aarch64-apple-darwin %S/Inputs/hello.f90 2>&1 | FileCheck %s --check-prefixes=CHECK,DARWIN,DARWIN-F128%f128-lib
! RUN: %flang -### --target=sparc-sun-solaris2.11 %S/Inputs/hello.f90 2>&1 | FileCheck %s --check-prefixes=CHECK,UNIX,SOLARIS-F128%f128-lib
! RUN: %flang -### --target=x86_64-unknown-freebsd %S/Inputs/hello.f90 2>&1 | FileCheck %s --check-prefixes=CHECK,BSD,BSD-F128%f128-lib
>From a4ccdd88855868eb436375083ffb2b34d0f32c7f Mon Sep 17 00:00:00 2001
From: Daniel Chen <cdchen at ca.ibm.com>
Date: Sun, 6 Apr 2025 21:14:04 -0400
Subject: [PATCH 2/2] Need to pass rpath when linking shared flang-rt.
---
clang/lib/Driver/ToolChain.cpp | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index 054618a44d7bc..12c517525b0aa 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -856,12 +856,13 @@ void ToolChain::addFlangRTLibPath(const ArgList &Args,
if (getVFS().exists(Twine(Path = getCompilerRTArgString(
Args, "runtime", ToolChain::FT_Static, true))))
CmdArgs.push_back(Path);
- else if (getVFS().exists(
- Twine(Path = getCompilerRTArgString(
- Args, "runtime", ToolChain::FT_Shared, true))))
- CmdArgs.push_back(Path);
else {
- CmdArgs.push_back("-lflang_rt.runtime");
+ if (getVFS().exists(
+ Twine(Path = getCompilerRTArgString(Args, "runtime",
+ ToolChain::FT_Shared, true))))
+ CmdArgs.push_back(Path);
+ else
+ CmdArgs.push_back("-lflang_rt.runtime");
addArchSpecificRPath(*this, Args, CmdArgs);
}
}
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