[flang-commits] [flang] 98e118c - [Flang] Don't use FortranDecimal for runtime (#121997)
via flang-commits
flang-commits at lists.llvm.org
Fri Feb 7 02:43:41 PST 2025
Author: Michael Kruse
Date: 2025-02-07T11:43:31+01:00
New Revision: 98e118ca435d280ff1c3540eb5e9b4140b44a1b4
URL: https://github.com/llvm/llvm-project/commit/98e118ca435d280ff1c3540eb5e9b4140b44a1b4
DIFF: https://github.com/llvm/llvm-project/commit/98e118ca435d280ff1c3540eb5e9b4140b44a1b4.diff
LOG: [Flang] Don't use FortranDecimal for runtime (#121997)
Avoid using the same library for runtime and compiler. `FortranDecimal`
was used in two ways:
1. As an auxiliary library needed for `libFortranRuntime.a`. This patch
adds the two source files of FortranDecimal directly into
FortranRuntime, so `FortranRuntime` is not used anymore.
2. As a library used by the Flang compiler. As the only remaining use of
the library, extra CMake code to make it compatible with the runtime can
be removed.
Before this PR, `enable_cuda_compilation` is applied to `FortranDecimal`
which causes everything that links to it, including flang (the
compiler), to depend on libcudart when CUDA support is enabled.
Having two runtime library just makes everything more complicated while
the user ideally should not be concerned with how the runtime is
structured internally. Some logic was copied for FortranDecimal because
of this, such as the ability to be compiled out-of tree
(b75a3c9f31c1ffdc9856aee32991d8129b372ee7) which is undocumented, the
logic to link against the various versions of Microsofts runtime library
(#70833), and avoiding dependency on the C++ runtime
(7783bba22c7add678d796741d30669c73159b3d8).
Added:
Modified:
clang/lib/Driver/ToolChains/CommonArgs.cpp
clang/lib/Driver/ToolChains/Flang.cpp
flang/docs/FlangDriver.md
flang/lib/Decimal/CMakeLists.txt
flang/runtime/CMakeLists.txt
flang/test/Driver/linker-flags.f90
flang/test/Driver/msvc-dependent-lib-flags.f90
flang/test/Driver/nostdlib.f90
flang/test/Runtime/no-cpp-dep.c
flang/test/lit.cfg.py
lld/COFF/MinGW.cpp
Removed:
################################################################################
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 699aadec86dcba9..e0b5d003ebb13fd 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1321,7 +1321,7 @@ void tools::addOpenMPHostOffloadingArgs(const Compilation &C,
/// Add Fortran runtime libs
void tools::addFortranRuntimeLibs(const ToolChain &TC, const ArgList &Args,
llvm::opt::ArgStringList &CmdArgs) {
- // Link FortranRuntime and FortranDecimal
+ // Link FortranRuntime
// These are handled earlier on Windows by telling the frontend driver to
// add the correct libraries to link against as dependents in the object
// file.
@@ -1338,7 +1338,6 @@ void tools::addFortranRuntimeLibs(const ToolChain &TC, const ArgList &Args,
addAsNeededOption(TC, Args, CmdArgs, /*as_needed=*/false);
}
CmdArgs.push_back("-lFortranRuntime");
- CmdArgs.push_back("-lFortranDecimal");
addArchSpecificRPath(TC, Args, CmdArgs);
// needs libexecinfo for backtrace functions
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index e4019c434968744..e7b68f4a8c60a44 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -365,21 +365,18 @@ static void processVSRuntimeLibrary(const ToolChain &TC, const ArgList &Args,
CmdArgs.push_back("-D_MT");
CmdArgs.push_back("--dependent-lib=libcmt");
CmdArgs.push_back("--dependent-lib=FortranRuntime.static.lib");
- CmdArgs.push_back("--dependent-lib=FortranDecimal.static.lib");
break;
case options::OPT__SLASH_MTd:
CmdArgs.push_back("-D_MT");
CmdArgs.push_back("-D_DEBUG");
CmdArgs.push_back("--dependent-lib=libcmtd");
CmdArgs.push_back("--dependent-lib=FortranRuntime.static_dbg.lib");
- CmdArgs.push_back("--dependent-lib=FortranDecimal.static_dbg.lib");
break;
case options::OPT__SLASH_MD:
CmdArgs.push_back("-D_MT");
CmdArgs.push_back("-D_DLL");
CmdArgs.push_back("--dependent-lib=msvcrt");
CmdArgs.push_back("--dependent-lib=FortranRuntime.dynamic.lib");
- CmdArgs.push_back("--dependent-lib=FortranDecimal.dynamic.lib");
break;
case options::OPT__SLASH_MDd:
CmdArgs.push_back("-D_MT");
@@ -387,7 +384,6 @@ static void processVSRuntimeLibrary(const ToolChain &TC, const ArgList &Args,
CmdArgs.push_back("-D_DLL");
CmdArgs.push_back("--dependent-lib=msvcrtd");
CmdArgs.push_back("--dependent-lib=FortranRuntime.dynamic_dbg.lib");
- CmdArgs.push_back("--dependent-lib=FortranDecimal.dynamic_dbg.lib");
break;
}
}
diff --git a/flang/docs/FlangDriver.md b/flang/docs/FlangDriver.md
index 309c5e2024dd849..5f960a954783dfe 100644
--- a/flang/docs/FlangDriver.md
+++ b/flang/docs/FlangDriver.md
@@ -175,19 +175,18 @@ like this:
```
$ flang -v -o example example.o
-"/usr/bin/ld" [...] example.o [...] "-lFortranRuntime" "-lFortranDecimal" [...]
+"/usr/bin/ld" [...] example.o [...] "-lFortranRuntime" [...]
```
The automatically added libraries are:
* `FortranRuntime`: Provides most of the Flang runtime library.
-* `FortranDecimal`: Provides operations for decimal numbers.
If the code is C/C++ based and invokes Fortran routines, one can either use Clang
or Flang as the linker driver. If Clang is used, it will automatically all
required runtime libraries needed by C++ (e.g., for STL) to the linker invocation.
-In this case, one has to explicitly provide the Fortran runtime libraries
-`FortranRuntime` and/or `FortranDecimal`. An alternative is to use Flang to link.
+In this case, one has to explicitly provide the Fortran runtime library
+`FortranRuntime`. An alternative is to use Flang to link.
In this case, it may be required to explicitly supply C++ runtime libraries.
On Darwin, the logical root where the system libraries are located (sysroot)
diff --git a/flang/lib/Decimal/CMakeLists.txt b/flang/lib/Decimal/CMakeLists.txt
index 2fd2a429d7c22b1..477d44e0565ebe0 100644
--- a/flang/lib/Decimal/CMakeLists.txt
+++ b/flang/lib/Decimal/CMakeLists.txt
@@ -6,89 +6,7 @@
#
#===------------------------------------------------------------------------===#
-if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
- cmake_minimum_required(VERSION 3.20.0)
-
- project(FortranDecimal C CXX)
-
- set(CMAKE_CXX_STANDARD 17)
- set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
- set(CMAKE_CXX_EXTENSIONS OFF)
-
- set(FLANG_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
-
- set(LLVM_COMMON_CMAKE_UTILS "${FLANG_SOURCE_DIR}/../cmake")
- set(LLVM_CMAKE_UTILS "${FLANG_SOURCE_DIR}/../llvm/cmake")
- set(CLANG_CMAKE_UTILS "${FLANG_SOURCE_DIR}/../clang/cmake")
-
- # Add path for custom modules
- list(INSERT CMAKE_MODULE_PATH 0
- "${FLANG_SOURCE_DIR}/cmake"
- "${FLANG_SOURCE_DIR}/cmake/modules"
- "${LLVM_COMMON_CMAKE_UTILS}"
- "${LLVM_COMMON_CMAKE_UTILS}/Modules"
- "${LLVM_CMAKE_UTILS}"
- "${LLVM_CMAKE_UTILS}/modules"
- "${CLANG_CMAKE_UTILS}/modules"
- )
-
- include(AddClang)
- include(AddLLVM)
- include(AddFlang)
- include(HandleLLVMOptions)
-
- include(TestBigEndian)
- test_big_endian(IS_BIGENDIAN)
- if (IS_BIGENDIAN)
- add_compile_definitions(FLANG_BIG_ENDIAN=1)
- else ()
- add_compile_definitions(FLANG_LITTLE_ENDIAN=1)
- endif ()
- include_directories(BEFORE
- ${FLANG_SOURCE_DIR}/include)
-endif()
-
-check_cxx_compiler_flag(-fno-lto FLANG_RUNTIME_HAS_FNO_LTO_FLAG)
-if (FLANG_RUNTIME_HAS_FNO_LTO_FLAG)
- append("-fno-lto" CMAKE_CXX_FLAGS)
-endif()
-
-# Disable libstdc++ assertions, even in an LLVM_ENABLE_ASSERTIONS build, to
-# avoid an unwanted dependency on libstdc++.so.
-add_definitions(-U_GLIBCXX_ASSERTIONS)
-
-set(sources
+add_flang_library(FortranDecimal
binary-to-decimal.cpp
decimal-to-binary.cpp
)
-
-include(AddFlangOffloadRuntime)
-enable_cuda_compilation(FortranDecimal "${sources}")
-enable_omp_offload_compilation("${sources}")
-
-add_flang_library(FortranDecimal INSTALL_WITH_TOOLCHAIN ${sources})
-
-if (DEFINED MSVC)
- set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded)
- add_flang_library(FortranDecimal.static INSTALL_WITH_TOOLCHAIN
- binary-to-decimal.cpp
- decimal-to-binary.cpp
- )
- set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDLL)
- add_flang_library(FortranDecimal.dynamic INSTALL_WITH_TOOLCHAIN
- binary-to-decimal.cpp
- decimal-to-binary.cpp
- )
- set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDebug)
- add_flang_library(FortranDecimal.static_dbg INSTALL_WITH_TOOLCHAIN
- binary-to-decimal.cpp
- decimal-to-binary.cpp
- )
- set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDebugDLL)
- add_flang_library(FortranDecimal.dynamic_dbg INSTALL_WITH_TOOLCHAIN
- binary-to-decimal.cpp
- decimal-to-binary.cpp
- )
- add_dependencies(FortranDecimal FortranDecimal.static FortranDecimal.dynamic
- FortranDecimal.static_dbg FortranDecimal.dynamic_dbg)
-endif()
diff --git a/flang/runtime/CMakeLists.txt b/flang/runtime/CMakeLists.txt
index bf27a121e4d174c..3587ec078c47fda 100644
--- a/flang/runtime/CMakeLists.txt
+++ b/flang/runtime/CMakeLists.txt
@@ -59,7 +59,7 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
)
endif()
-set(linked_libraries FortranDecimal)
+set(linked_libraries "")
# function checks
find_package(Backtrace)
@@ -116,6 +116,8 @@ add_definitions(-U_LIBCPP_ENABLE_ASSERTIONS)
add_subdirectory(Float128Math)
set(sources
+ ${FLANG_SOURCE_DIR}/lib/Decimal/binary-to-decimal.cpp
+ ${FLANG_SOURCE_DIR}/lib/Decimal/decimal-to-binary.cpp
ISO_Fortran_binding.cpp
allocator-registry.cpp
allocatable.cpp
@@ -288,26 +290,18 @@ else()
)
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded)
add_flang_library(FortranRuntime.static ${sources}
- LINK_LIBS
- FortranDecimal.static
INSTALL_WITH_TOOLCHAIN)
set_target_properties(FortranRuntime.static PROPERTIES FOLDER "Flang/Runtime Libraries")
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDLL)
add_flang_library(FortranRuntime.dynamic ${sources}
- LINK_LIBS
- FortranDecimal.dynamic
INSTALL_WITH_TOOLCHAIN)
set_target_properties(FortranRuntime.dynamic PROPERTIES FOLDER "Flang/Runtime Libraries")
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDebug)
add_flang_library(FortranRuntime.static_dbg ${sources}
- LINK_LIBS
- FortranDecimal.static_dbg
INSTALL_WITH_TOOLCHAIN)
set_target_properties(FortranRuntime.static_dbg PROPERTIES FOLDER "Flang/Runtime Libraries")
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDebugDLL)
add_flang_library(FortranRuntime.dynamic_dbg ${sources}
- LINK_LIBS
- FortranDecimal.dynamic_dbg
INSTALL_WITH_TOOLCHAIN)
set_target_properties(FortranRuntime.dynamic_dbg PROPERTIES FOLDER "Flang/Runtime Libraries")
add_dependencies(FortranRuntime FortranRuntime.static FortranRuntime.dynamic
diff --git a/flang/test/Driver/linker-flags.f90 b/flang/test/Driver/linker-flags.f90
index b998cbaa6227c35..16bd4c3ba837113 100644
--- a/flang/test/Driver/linker-flags.f90
+++ b/flang/test/Driver/linker-flags.f90
@@ -33,7 +33,7 @@
! SOLARIS-F128NONE-NOT: FortranFloat128Math
! UNIX-F128LIBQUADMATH-SAME: "-lFortranFloat128Math" "--as-needed" "-lquadmath" "--no-as-needed"
! SOLARIS-F128LIBQUADMATH-SAME: "-lFortranFloat128Math" "-z" "ignore" "-lquadmath" "-z" "record"
-! UNIX-SAME: "-lFortranRuntime" "-lFortranDecimal" "-lm"
+! UNIX-SAME: "-lFortranRuntime" "-lm"
! COMPILER-RT: "{{.*}}{{\\|/}}libclang_rt.builtins.a"
! BSD-LABEL: "{{.*}}ld{{(\.exe)?}}"
@@ -41,7 +41,6 @@
! BSD-F128NONE-NOT: FortranFloat128Math
! BSD-F128LIBQUADMATH-SAME: "-lFortranFloat128Math" "--as-needed" "-lquadmath" "--no-as-needed"
! BSD-SAME: -lFortranRuntime
-! BSD-SAME: -lFortranDecimal
! BSD-SAME: -lexecinfo
! DARWIN-LABEL: "{{.*}}ld{{(\.exe)?}}"
@@ -49,20 +48,18 @@
! DARWIN-F128NONE-NOT: FortranFloat128Math
! DARWIN-F128LIBQUADMATH-SAME: "-lFortranFloat128Math" "--as-needed" "-lquadmath" "--no-as-needed"
! DARWIN-SAME: -lFortranRuntime
-! DARWIN-SAME: -lFortranDecimal
! HAIKU-LABEL: "{{.*}}ld{{(\.exe)?}}"
! HAIKU-SAME: "[[object_file]]"
! HAIKU-F128NONE-NOT: FortranFloat128Math
! HAIKU-F128LIBQUADMATH-SAME: "-lFortranFloat128Math" "--as-needed" "-lquadmath" "--no-as-needed"
-! HAIKU-SAME: "-lFortranRuntime" "-lFortranDecimal"
+! HAIKU-SAME: "-lFortranRuntime"
! MINGW-LABEL: "{{.*}}ld{{(\.exe)?}}"
! MINGW-SAME: "[[object_file]]"
! MINGW-F128NONE-NOT: FortranFloat128Math
! MINGW-F128LIBQUADMATH-SAME: "-lFortranFloat128Math" "--as-needed" "-lquadmath" "--no-as-needed"
! MINGW-SAME: -lFortranRuntime
-! MINGW-SAME: -lFortranDecimal
! NOTE: This also matches lld-link (when CLANG_DEFAULT_LINKER=lld) and
! any .exe suffix that is added when resolving to the full path of
diff --git a/flang/test/Driver/msvc-dependent-lib-flags.f90 b/flang/test/Driver/msvc-dependent-lib-flags.f90
index 765917f07d8e723..befe61fdadcd141 100644
--- a/flang/test/Driver/msvc-dependent-lib-flags.f90
+++ b/flang/test/Driver/msvc-dependent-lib-flags.f90
@@ -8,7 +8,6 @@
! MSVC-SAME: -D_MT
! MSVC-SAME: --dependent-lib=libcmt
! MSVC-SAME: --dependent-lib=FortranRuntime.static.lib
-! MSVC-SAME: --dependent-lib=FortranDecimal.static.lib
! MSVC-DEBUG: -fc1
! MSVC-DEBUG-SAME: --dependent-lib=clang_rt.builtins.lib
@@ -16,7 +15,6 @@
! MSVC-DEBUG-SAME: -D_DEBUG
! MSVC-DEBUG-SAME: --dependent-lib=libcmtd
! MSVC-DEBUG-SAME: --dependent-lib=FortranRuntime.static_dbg.lib
-! MSVC-DEBUG-SAME: --dependent-lib=FortranDecimal.static_dbg.lib
! MSVC-DLL: -fc1
! MSVC-DLL-SAME: --dependent-lib=clang_rt.builtins.lib
@@ -24,7 +22,6 @@
! MSVC-DLL-SAME: -D_DLL
! MSVC-DLL-SAME: --dependent-lib=msvcrt
! MSVC-DLL-SAME: --dependent-lib=FortranRuntime.dynamic.lib
-! MSVC-DLL-SAME: --dependent-lib=FortranDecimal.dynamic.lib
! MSVC-DLL-DEBUG: -fc1
! MSVC-DLL-DEBUG-SAME: --dependent-lib=clang_rt.builtins.lib
@@ -33,4 +30,3 @@
! MSVC-DLL-DEBUG-SAME: -D_DLL
! MSVC-DLL-DEBUG-SAME: --dependent-lib=msvcrtd
! MSVC-DLL-DEBUG-SAME: --dependent-lib=FortranRuntime.dynamic_dbg.lib
-! MSVC-DLL-DEBUG-SAME: --dependent-lib=FortranDecimal.dynamic_dbg.lib
diff --git a/flang/test/Driver/nostdlib.f90 b/flang/test/Driver/nostdlib.f90
index cd707e632a45ff0..ab7c675fe7b77d5 100644
--- a/flang/test/Driver/nostdlib.f90
+++ b/flang/test/Driver/nostdlib.f90
@@ -25,5 +25,4 @@
! platform individually.
! CHECK-NOT: "-lFortranRuntime"
-! CHECK-NOT: "-lFortranDecimal"
! CHECK-NOT: "-lgcc"
diff --git a/flang/test/Runtime/no-cpp-dep.c b/flang/test/Runtime/no-cpp-dep.c
index 606a5d189f71996..b1a5fa004014cc8 100644
--- a/flang/test/Runtime/no-cpp-dep.c
+++ b/flang/test/Runtime/no-cpp-dep.c
@@ -6,7 +6,7 @@ a C compiler.
REQUIRES: c-compiler
RUN: %if system-aix %{ export OBJECT_MODE=64 %}
-RUN: %cc -std=c99 %s -I%include %libruntime %libdecimal -lm \
+RUN: %cc -std=c99 %s -I%include %libruntime -lm \
RUN: %if system-aix %{-lpthread %}
RUN: rm a.out
*/
diff --git a/flang/test/lit.cfg.py b/flang/test/lit.cfg.py
index f43234fb125b7e7..c452b6d231c89f0 100644
--- a/flang/test/lit.cfg.py
+++ b/flang/test/lit.cfg.py
@@ -168,12 +168,10 @@
# we don't have one, we can just disable the test.
if config.cc:
libruntime = os.path.join(config.flang_lib_dir, "libFortranRuntime.a")
- libdecimal = os.path.join(config.flang_lib_dir, "libFortranDecimal.a")
include = os.path.join(config.flang_src_dir, "include")
if (
os.path.isfile(libruntime)
- and os.path.isfile(libdecimal)
and os.path.isdir(include)
):
config.available_features.add("c-compiler")
@@ -183,7 +181,6 @@
)
)
tools.append(ToolSubst("%libruntime", command=libruntime, unresolved="fatal"))
- tools.append(ToolSubst("%libdecimal", command=libdecimal, unresolved="fatal"))
tools.append(ToolSubst("%include", command=include, unresolved="fatal"))
# Add all the tools and their substitutions (if applicable). Use the search paths provided for
diff --git a/lld/COFF/MinGW.cpp b/lld/COFF/MinGW.cpp
index a6407bc279200e6..8f1c1ebcc3f1313 100644
--- a/lld/COFF/MinGW.cpp
+++ b/lld/COFF/MinGW.cpp
@@ -50,7 +50,6 @@ AutoExporter::AutoExporter(
"libc++",
"libc++abi",
"libFortranRuntime",
- "libFortranDecimal",
"libunwind",
"libmsvcrt",
"libucrtbase",
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