[Bug bootstrap/78251] config/gettext.m4 and config/iconv.m4 contaminate CPPFLAGS (can lead to build failures when libunwind-headers from MacPorts is active)

[egallager at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78251

Eric Gallager  changed:

   What|Removed |Added

 CC||bruno at clisp dot org

--- Comment #14 from Eric Gallager  ---
So, there's been some talk about how replacing GCC's local copies of stuff from
gettext with an external gettext that might be relevant to this bug:
https://gcc.gnu.org/pipermail/gcc/2022-June/238920.html

[Bug bootstrap/78251] config/gettext.m4 and config/iconv.m4 contaminate CPPFLAGS (can lead to build failures when libunwind-headers from MacPorts is active)

[egallager at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78251

Eric Gallager  changed:

   What|Removed |Added

 CC||casner at acm dot org

--- Comment #13 from Eric Gallager  ---
Stephen Casner and Nick Alcock discussed what I think is this issue on the
bug-gettext mailing list:
https://lists.gnu.org/archive/html/bug-gettext/2021-02/msg0.html

[Bug bootstrap/78251] config/gettext.m4 and config/iconv.m4 contaminate CPPFLAGS (can lead to build failures when libunwind-headers from MacPorts is active)

[michael+gcc at stapelberg dot ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78251

--- Comment #12 from Michael Stapelberg  ---
I’m also running into this bug: I have recently started linking strace against
libunwind (for its handy --stack-traces option), and like having strace
available in my package build dependencies to debug build failures
interactively.

I’m using gcc 9.3.0 and libunwind 1.4.0. The first build failure message I’m
encountering is (I attached the full build log to this bug, too):

libtool: compile:  /usr/src/gcc-amd64-9.3.0-4/build/./gcc/xgcc -shared-libgcc
-B/usr/src/gcc-amd64-9.3.0-4/build/./gcc -nostdinc++
-L/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/bin/
-B/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/lib/ -isystem
/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/include -isystem
/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/sys-include -fno-checking
-I/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/../libgcc
-I/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++ -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=eh_ptr.lo -g -O2 -D_GNU_SOURCE -c
/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++/eh_ptr.cc  -fPIC -DPIC
-D_GLIBCXX_SHARED -o eh_ptr.o
libtool: compile:  /usr/src/gcc-amd64-9.3.0-4/build/./gcc/xgcc -shared-libgcc
-B/usr/src/gcc-amd64-9.3.0-4/build/./gcc -nostdinc++
-L/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/src
-L/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/bin/
-B/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/lib/ -isystem
/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/include -isystem
/ro/gcc-amd64-9.3.0-4/out/x86_64-pc-linux-gnu/sys-include -fno-checking
-I/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/../libgcc
-I/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/usr/src/gcc-amd64-9.3.0-4/build/x86_64-pc-linux-gnu/libstdc++-v3/include
-I/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++ -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=eh_personality.lo -g -O2 -D_GNU_SOURCE -c
/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++/eh_personality.cc  -fPIC
-DPIC -D_GLIBCXX_SHARED -o eh_personality.o
In file included from
/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++/eh_call.cc:28:
/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++/unwind-cxx.h:92:3: error:
'_Unwind_Ptr' does not name a type; did you mean '_Unwind_SetIP'?
   92 |   _Unwind_Ptr catchTemp;
  |   ^~~
  |   _Unwind_SetIP
/usr/src/gcc-amd64-9.3.0-4/libstdc++-v3/libsupc++/unwind-cxx.h:146:3: error:
'_Unwind_Ptr' does not name a type; did you mean '_Unwind_SetIP'?
  146 |   _Unwind_Ptr catchTemp;
  |   ^~~
  |   _Unwind_SetIP

[Bug bootstrap/78251] config/gettext.m4 and config/iconv.m4 contaminate CPPFLAGS (can lead to build failures when libunwind-headers from MacPorts is active)

[michael+gcc at stapelberg dot ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78251

Michael Stapelberg  changed:

   What|Removed |Added

 CC||michael+gcc at stapelberg dot 
ch

--- Comment #11 from Michael Stapelberg  ---
Created attachment 48375
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48375=edit
full build log for failing build

[Bug bootstrap/78251] config/gettext.m4 and config/iconv.m4 contaminate CPPFLAGS (can lead to build failures when libunwind-headers from MacPorts is active)

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78251

Eric Gallager  changed:

   What|Removed |Added

Summary|config/gettext.m4 and   |config/gettext.m4 and
   |config/iconv.m4 contaminate |config/iconv.m4 contaminate
   |CPPFLAGS|CPPFLAGS (can lead to build
   ||failures when
   ||libunwind-headers from
   ||MacPorts is active)

--- Comment #10 from Eric Gallager  ---
(In reply to Eric Gallager from comment #9)
> (In reply to Eric Gallager from comment #8)
> > r265896 might have affected this
> 
> Update: apparently not; I still had to deactivate libunwind-headers again on
> my latest build of gcc

Since I keep running into this, I'm adding that part to the title for easier
findability