I have a project that isn't part of Fedora yet - though really I should add it at this point. Its php-cpp. It allows me to write c++ extensions for PHP. Its worked well for a couple years. I upgraded to F32 beta and now when compiling anything that includes its headers compilation fails and I'm not entirely sure why. g++ -MT pdf-image.o -MMD -MP -MF .d/pdf-image.Td -Wall -g -c -O2 -std=c++11 -fPIC `pkg-config poppler-cpp fontconfig openssl -- cflags` -DVERSION=\"0.11.16\" -c -o pdf-image.o pdf-image.cpp In file included from /usr/include/phpcpp.h:38, from pdf-image.cpp:8: /usr/include/phpcpp/throwable.h:29:1: error: expected class-name before ‘{’ token I've attached the header. Any gcc experts out there able to tell me what's wrong with the header format that used to compile but no longer does?

So, from the offlist posted preprocessed source, seems the TU includes the following libstdc++ headers #include <string> #include <vector> #include <memory> #include <list> #include <map> #include <set> #include <functional> and then uses std::runtime_exception. That one is defined in <stdexcept> header though, and is not included. Before https://gcc.gnu.org/legacy-ml/libstdc++/2019-06/msg00032.html change it has been included as implementation detail from headers included in <memory>, <map> or <functional> from the above list. So, you just need to make sure <stdexcept> is also included if you need classes from it.

On Mon, Mar 30, 2020 at 07:50:48PM +0200, Jakub Jelinek wrote: > On Mon, Mar 30, 2020 at 11:34:15AM -0600, Nathanael D. Noblet wrote: > > I have a project that isn't part of Fedora yet - though really I > > should add it at this point. Its php-cpp. It allows me to write c++ > > extensions for PHP. Its worked well for a couple years. I upgraded to > > F32 beta and now when compiling anything that includes its headers > > compilation fails and I'm not entirely sure why. > > > > g++ -MT pdf-image.o -MMD -MP -MF .d/pdf-image.Td -Wall -g -c -O2 > > -std=c++11 -fPIC `pkg-config poppler-cpp fontconfig openssl -- > > cflags` -DVERSION=\"0.11.16\" -c -o pdf-image.o pdf-image.cpp > > In file included from /usr/include/phpcpp.h:38, > > from pdf-image.cpp:8: > > /usr/include/phpcpp/throwable.h:29:1: error: expected class-name before > > ‘{’ token > > > > I've attached the header. Any gcc experts out there able to tell me > > what's wrong with the header format that used to compile but no longer > > does? > > Please mail me a preprocessed source instead (e.g. rerun the g++ command > line with -save-temps option and mail pdf-image.ii the compiler creates, > or drop -M* options and their arguments, change -c to -E and pdf-image.o > to pdf-image.ii). So, from the offlist posted preprocessed source, seems the TU includes the following libstdc++ headers #include <string> #include <vector> #include <memory> #include <list> #include <map> #include <set> #include <functional> and then uses std::runtime_exception. That one is defined in <stdexcept> header though, and is not included. Before https://gcc.gnu.org/legacy-ml/libstdc++/2019-06/msg00032.html change it has been included as implementation detail from headers included in <memory>, <map> or <functional> from the above list. So, you just need to make sure <stdexcept> is also included if you need classes from it.