https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97549
Bug ID: 97549
Summary: include/pstl rebase breaking <execution>
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: nathan at gcc dot gnu.org
Target Milestone: ---
I'm seeing compilation errors of a file that just contains:
#include <execution>
following
* e957b86ca26 2020-10-21 | libstdc++: Rebase include/pstl to current upstream
[Thomas Rodgers]
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/gcc/testsuite/g++/../../xg++
-B/data/users/nathans/me/r-e957b86ca26/obj/x86_64/gcc/testsuite/g++/../../
-g
-I/data/users/nathans/me/r-e957b86ca26/src/gcc/testsuite/../../libsanitizer/include
-fdiagnostics-plain-output -nostdinc++
-I/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/libsupc++
-I/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/backward
-I/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/testsuite/util
-fmessage-length=0 -O2
-L/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs
-B/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs
-L/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs
-B/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/./libitm/
-L/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/./libitm/.libs
-lm -c xtreme-header-2_a.C
In file included from
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/parallel_backend.h:14,
from
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/algorithm_impl.h:22,
from
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/pstl/glue_execution_defs.h:50,
from
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/execution:32,
from xtreme-header-2_a.C:5:
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/parallel_backend_serial.h:134:25:
error: '__serial' is not a namespace-name; did you mean '__internal'?
In file included from
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/algorithm_impl.h:22,
from
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/pstl/glue_execution_defs.h:50,
from
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/execution:32,
from xtreme-header-2_a.C:5:
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/parallel_backend.h:17:43:
error: 'namespace __pstl::__par_backend = __pstl::__pstl::__serial_backend;'
conflicts with a previous declaration
In file included from
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/parallel_backend.h:14,
from
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/algorithm_impl.h:22,
from
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/pstl/glue_execution_defs.h:50,
from
/data/users/nathans/me/r-e957b86ca26/obj/x86_64/x86_64-pc-linux-gnu/libstdc++-v3/include/execution:32,
from xtreme-header-2_a.C:5:
/data/users/nathans/me/r-e957b86ca26/src/libstdc++-v3/include/pstl/parallel_backend_serial.h:132:11:
note: previous declaration 'namespace __pstl::__par_backend { }'
... more errors follow,
it seems parallel_backend.h is being #included twice, with inconsistent
settings of _PSTL_PAR_BACKEND_SERIAL and _PSTL_PAR_BACKEND_TBB
am I missing something?
