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Configure for faster C++ linking using 'mold', if it is installed.

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This commit is contained in:
Wilson Snyder 2023-05-23 21:26:29 -04:00
parent 19d0aabe7a
commit 426069a4dd
5 changed files with 14 additions and 3 deletions
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1
Changes
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@ -21,6 +21,7 @@ Verilator 5.011 devel
* Support get_randstate/set_randstate class method function.
* Add creating __inputs.vpp file with --debug (#4177). [Tudor Timi]
* Optimize VPI callValueCbs (#4155). [Hennadii Chernyshchyk]
* Configure for faster C++ linking using 'mold', if it is installed.
* Fix crash on duplicate imported modules (#3231). [Robert Balas]
* Fix false WIDTHEXPAND on array declarations (#3959). [JOTEGO]
* Fix marking overridden methods as coroutines (#4120) (#4169). [Krzysztof Bieganski, Antmicro Ltd]

4
ci/ci-install.bash
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@ -63,8 +63,8 @@ if [ "$CI_BUILD_STAGE_NAME" = "build" ]; then
sudo apt-get install ccache help2man libfl-dev
if [ "$CI_RUNS_ON" != "ubuntu-22.04" ]; then
# Some conflict of libunwind verison on 22.04, can live without it for now
sudo apt-get install libgoogle-perftools-dev ||
sudo apt-get install libgoogle-perftools-dev
sudo apt-get install libgoogle-perftools-dev mold ||
sudo apt-get install libgoogle-perftools-dev mold
fi
if [ "$CI_RUNS_ON" = "ubuntu-20.04" ] || [ "$CI_RUNS_ON" = "ubuntu-22.04" ]; then
sudo apt-get install libsystemc libsystemc-dev ||

5
configure.ac
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@ -470,6 +470,10 @@ m4_foreach([ldflag], [
AC_SUBST(CFG_LDLIBS_THREADS)
AC_SUBST(CFG_LDFLAGS_THREADS_CMAKE)
# If 'mold' is installed, use it to link for faster buildtimes
_MY_LDLIBS_CHECK_OPT(CFG_LDFLAGS_SRC, -fuse-ld=mold)
_MY_LDLIBS_CHECK_OPT(CFG_LDFLAGS_VERILATED, -fuse-ld=mold)
# When linking partially statically
if test "$CFG_ENABLE_PARTIAL_STATIC" = "yes"; then
_MY_LDLIBS_CHECK_OPT(CFG_LDFLAGS_SRC, -static-libgcc)
@ -480,6 +484,7 @@ else
LTCMALLOC=-ltcmalloc_minimal
fi
AC_SUBST(CFG_LDFLAGS_SRC)
AC_SUBST(CFG_LDFLAGS_VERILATED)
# The pthread library is required by tcmalloc, so add it if it exists. If it
# does not, the tcmalloc check below will fail anyway, and linking against

3
docs/guide/install.rst
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@ -104,6 +104,7 @@ for good performance:
::
sudo apt-get install ccache # If present at build, needed for run
sudo apt-get install mold # If present at build, needed for run
sudo apt-get install libgoogle-perftools-dev numactl
The following is optional but is recommended for nicely rendered command line
@ -124,7 +125,7 @@ Those developing Verilator itself may also want these (see internals.rst):
::
sudo apt-get install gdb graphviz cmake clang clang-format-14 gprof lcov
sudo apt-get install clang clang-format-14 cmake gdb gprof graphviz lcov
sudo apt-get install libclang-dev yapf3
sudo pip3 install clang sphinx sphinx_rtd_theme sphinxcontrib-spelling breathe ruff
cpan install Pod::Perldoc

4
include/verilated.mk.in
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@ -31,6 +31,8 @@ CFG_CXXFLAGS_NO_UNUSED = @CFG_CXXFLAGS_NO_UNUSED@
CFG_CXXFLAGS_WEXTRA = @CFG_CXXFLAGS_WEXTRA@
# Compiler flags that enable coroutine support
CFG_CXXFLAGS_COROUTINES = @CFG_CXXFLAGS_COROUTINES@
# Linker flags
CFG_LDFLAGS_VERILATED = @CFG_LDFLAGS_VERILATED@
# Linker libraries for multithreading
CFG_LDLIBS_THREADS = @CFG_LDLIBS_THREADS@
@ -77,6 +79,8 @@ VPATH += ..
VPATH += $(VERILATOR_ROOT)/include
VPATH += $(VERILATOR_ROOT)/include/vltstd
LDFLAGS += $(CFG_LDFLAGS_VERILATED)
#OPT = -ggdb -DPRINTINITSTR -DDETECTCHANGE
#OPT = -ggdb -DPRINTINITSTR
CPPFLAGS += $(OPT)