Perf build auto-detects features and packages already installed
for its build. This is done in directory tools/build/feature. This
directory contains small sample programs. When they successfully
compile the necessary prereqs in form of libraries and header
files are present.
Such a check is also done for clang. And this check fails.
Fix this and update to the latest C++ standard and use the
new library provided by clang (which contains new packaging)
see this link for reference:
https://fedoraproject.org/wiki/Changes/Stop-Shipping-Individual-Component-Libraries-In-clang-lib-Package
Output before:
# rm -f ./test-clang.bin; make test-clang.bin; ./test-clang.bin; \
ll test-clang.make.output
g++ -MD -Wall -Werror -o test-clang.bin test-clang.cpp \
> test-clang.make.output 2>&1 -std=gnu++14 \
-I/usr/include \
-L/usr/lib64 \
-Wl,--start-group -lclangBasic -lclangDriver \
-lclangFrontend -lclangEdit -lclangLex \
-lclangAST -Wl,--end-group \
-lLLVM-16 \
\
> test-clang.make.output 2>&1
make: *** [Makefile:356: test-clang.bin] Error 1
-bash: ./test-clang.bin: No such file or directory
-rw-r--r--. 1 root root 252041 Jul 12 09:56 test-clang.make.output
#
File test-clang.make.output contains many lines of unreferenced
symbols.
Output after:
# rm -f ./test-clang.bin; make test-clang.bin; ./test-clang.bin; \
cat test-clang.make.output
g++ -MD -Wall -Werror -o test-clang.bin test-clang.cpp \
> test-clang.make.output 2>&1 -std=gnu++17 \
-I/usr/include \
-L/usr/lib64 \
-Wl,--start-group -lclang-cpp -Wl,--end-group \
-lLLVM-16 \
\
> test-clang.make.output 2>&1
#
Signed-off-by: Thomas Richter <[email protected]>
---
tools/build/feature/Makefile | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index f8db69654791..0b4a6e43c5cc 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -353,12 +353,10 @@ $(OUTPUT)test-llvm-version.bin:
> $(@:.bin=.make.output) 2>&1
$(OUTPUT)test-clang.bin:
- $(BUILDXX) -std=gnu++14 \
+ $(BUILDXX) -std=gnu++17 \
-I$(shell $(LLVM_CONFIG) --includedir) \
-L$(shell $(LLVM_CONFIG) --libdir) \
- -Wl,--start-group -lclangBasic -lclangDriver \
- -lclangFrontend -lclangEdit -lclangLex \
- -lclangAST -Wl,--end-group \
+ -Wl,--start-group -lclang-cpp -Wl,--end-group \
$(shell $(LLVM_CONFIG) --libs Core option) \
$(shell $(LLVM_CONFIG) --system-libs) \
> $(@:.bin=.make.output) 2>&1
--
2.41.0
On Wed, Jul 12, 2023 at 1:35 AM Thomas Richter <[email protected]> wrote:
>
> Perf build auto-detects features and packages already installed
> for its build. This is done in directory tools/build/feature. This
> directory contains small sample programs. When they successfully
> compile the necessary prereqs in form of libraries and header
> files are present.
>
> Such a check is also done for clang. And this check fails.
>
> Fix this and update to the latest C++ standard and use the
> new library provided by clang (which contains new packaging)
> see this link for reference:
> https://fedoraproject.org/wiki/Changes/Stop-Shipping-Individual-Component-Libraries-In-clang-lib-Package
>
> Output before:
> # rm -f ./test-clang.bin; make test-clang.bin; ./test-clang.bin; \
> ll test-clang.make.output
> g++ -MD -Wall -Werror -o test-clang.bin test-clang.cpp \
> > test-clang.make.output 2>&1 -std=gnu++14 \
> -I/usr/include \
> -L/usr/lib64 \
> -Wl,--start-group -lclangBasic -lclangDriver \
> -lclangFrontend -lclangEdit -lclangLex \
> -lclangAST -Wl,--end-group \
> -lLLVM-16 \
> \
> > test-clang.make.output 2>&1
> make: *** [Makefile:356: test-clang.bin] Error 1
> -bash: ./test-clang.bin: No such file or directory
> -rw-r--r--. 1 root root 252041 Jul 12 09:56 test-clang.make.output
> #
>
> File test-clang.make.output contains many lines of unreferenced
> symbols.
>
> Output after:
> # rm -f ./test-clang.bin; make test-clang.bin; ./test-clang.bin; \
> cat test-clang.make.output
> g++ -MD -Wall -Werror -o test-clang.bin test-clang.cpp \
> > test-clang.make.output 2>&1 -std=gnu++17 \
> -I/usr/include \
> -L/usr/lib64 \
> -Wl,--start-group -lclang-cpp -Wl,--end-group \
> -lLLVM-16 \
> \
> > test-clang.make.output 2>&1
> #
>
> Signed-off-by: Thomas Richter <[email protected]>
Tested-by: Ian Rogers <[email protected]>
Thanks!
Ian
> ---
> tools/build/feature/Makefile | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> index f8db69654791..0b4a6e43c5cc 100644
> --- a/tools/build/feature/Makefile
> +++ b/tools/build/feature/Makefile
> @@ -353,12 +353,10 @@ $(OUTPUT)test-llvm-version.bin:
> > $(@:.bin=.make.output) 2>&1
>
> $(OUTPUT)test-clang.bin:
> - $(BUILDXX) -std=gnu++14 \
> + $(BUILDXX) -std=gnu++17 \
> -I$(shell $(LLVM_CONFIG) --includedir) \
> -L$(shell $(LLVM_CONFIG) --libdir) \
> - -Wl,--start-group -lclangBasic -lclangDriver \
> - -lclangFrontend -lclangEdit -lclangLex \
> - -lclangAST -Wl,--end-group \
> + -Wl,--start-group -lclang-cpp -Wl,--end-group \
> $(shell $(LLVM_CONFIG) --libs Core option) \
> $(shell $(LLVM_CONFIG) --system-libs) \
> > $(@:.bin=.make.output) 2>&1
> --
> 2.41.0
>
On Wed, Jul 12, 2023 at 8:02 PM Ian Rogers <[email protected]> wrote:
>
> On Wed, Jul 12, 2023 at 1:35 AM Thomas Richter <[email protected]> wrote:
> >
> > Perf build auto-detects features and packages already installed
> > for its build. This is done in directory tools/build/feature. This
> > directory contains small sample programs. When they successfully
> > compile the necessary prereqs in form of libraries and header
> > files are present.
> >
> > Such a check is also done for clang. And this check fails.
> >
> > Fix this and update to the latest C++ standard and use the
> > new library provided by clang (which contains new packaging)
> > see this link for reference:
> > https://fedoraproject.org/wiki/Changes/Stop-Shipping-Individual-Component-Libraries-In-clang-lib-Package
> >
> > Output before:
> > # rm -f ./test-clang.bin; make test-clang.bin; ./test-clang.bin; \
> > ll test-clang.make.output
> > g++ -MD -Wall -Werror -o test-clang.bin test-clang.cpp \
> > > test-clang.make.output 2>&1 -std=gnu++14 \
> > -I/usr/include \
> > -L/usr/lib64 \
> > -Wl,--start-group -lclangBasic -lclangDriver \
> > -lclangFrontend -lclangEdit -lclangLex \
> > -lclangAST -Wl,--end-group \
> > -lLLVM-16 \
> > \
> > > test-clang.make.output 2>&1
> > make: *** [Makefile:356: test-clang.bin] Error 1
> > -bash: ./test-clang.bin: No such file or directory
> > -rw-r--r--. 1 root root 252041 Jul 12 09:56 test-clang.make.output
> > #
> >
> > File test-clang.make.output contains many lines of unreferenced
> > symbols.
> >
> > Output after:
> > # rm -f ./test-clang.bin; make test-clang.bin; ./test-clang.bin; \
> > cat test-clang.make.output
> > g++ -MD -Wall -Werror -o test-clang.bin test-clang.cpp \
> > > test-clang.make.output 2>&1 -std=gnu++17 \
> > -I/usr/include \
> > -L/usr/lib64 \
> > -Wl,--start-group -lclang-cpp -Wl,--end-group \
> > -lLLVM-16 \
> > \
> > > test-clang.make.output 2>&1
> > #
> >
> > Signed-off-by: Thomas Richter <[email protected]>
>
> Tested-by: Ian Rogers <[email protected]>
Ah, presumably obsolete to:
https://lore.kernel.org/linux-perf-users/[email protected]/
Thanks,
Ian
> Thanks!
> Ian
>
> > ---
> > tools/build/feature/Makefile | 6 ++----
> > 1 file changed, 2 insertions(+), 4 deletions(-)
> >
> > diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
> > index f8db69654791..0b4a6e43c5cc 100644
> > --- a/tools/build/feature/Makefile
> > +++ b/tools/build/feature/Makefile
> > @@ -353,12 +353,10 @@ $(OUTPUT)test-llvm-version.bin:
> > > $(@:.bin=.make.output) 2>&1
> >
> > $(OUTPUT)test-clang.bin:
> > - $(BUILDXX) -std=gnu++14 \
> > + $(BUILDXX) -std=gnu++17 \
> > -I$(shell $(LLVM_CONFIG) --includedir) \
> > -L$(shell $(LLVM_CONFIG) --libdir) \
> > - -Wl,--start-group -lclangBasic -lclangDriver \
> > - -lclangFrontend -lclangEdit -lclangLex \
> > - -lclangAST -Wl,--end-group \
> > + -Wl,--start-group -lclang-cpp -Wl,--end-group \
> > $(shell $(LLVM_CONFIG) --libs Core option) \
> > $(shell $(LLVM_CONFIG) --system-libs) \
> > > $(@:.bin=.make.output) 2>&1
> > --
> > 2.41.0
> >