https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93092
Bug ID: 93092 Summary: g++ takes tremendous compilation times Product: gcc Version: 9.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: ad...@tho-otto.de Target Milestone: --- Created attachment 47558 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47558&action=edit preprocessed version of nfosmesa_init.cpp When compiling the attached, preprocessed file with -O2 (or above), and generating debug information, cc1plus takes incredible compilation times (>5min on a 4GHz Intel i7), and also uses incredible amounts of memory (> 16GB). The attached file is a preprocessed version of a source file from the ARAnyM project, and the original file contains just a single function. Tried on openSUSE Tumbleweed: $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/9/lto-wrapper OFFLOAD_TARGET_NAMES=hsa:nvptx-none Target: x86_64-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,ada,go,d --enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver --disable-werror --with-gxx-include-dir=/usr/include/c++/9 --enable-ssp --disable-libssp --disable-libvtv --disable-cet --disable-libcc1 --enable-plugin --with-bugurl=https://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-libphobos --enable-version-specific-runtime-libs --with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function --program-suffix=-9 --without-system-libunwind --enable-multilib --with-arch-32=x86-64 --with-tune=generic --with-build-config=bootstrap-lto-lean --enable-link-mutex --build=x86_64-suse-linux --host=x86_64-suse-linux Thread model: posix gcc version 9.2.1 20190903 [gcc-9-branch revision 275330] (SUSE Linux)