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

[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 <michael+gcc at stapelberg dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |michael+gcc at stapelberg dot ch

--- Comment #11 from Michael Stapelberg <michael+gcc at stapelberg dot ch> ---
Created attachment 48375
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48375&action=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)

[michael+gcc at stapelberg dot ch]

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

--- Comment #12 from Michael Stapelberg <michael+gcc at stapelberg dot ch> ---
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)

[egallager at gcc dot gnu.org]

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

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |casner at acm dot org

--- Comment #13 from Eric Gallager <egallager at gcc dot gnu.org> ---
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/msg00000.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]

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

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bruno at clisp dot org

--- Comment #14 from Eric Gallager <egallager at gcc dot gnu.org> ---
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