Hi, Mateusz, I manually merge the chagelist and now it works fine. Thank you very much. Frank ________________________________ 发件人: Boost-users <boost-users-bounces@lists.boost.org> 代表 Mateusz Loskot via Boost-users <boost-users@lists.boost.org> 发送时间: 2022年1月8日 4:09 收件人: boost-users@lists.boost.org <boost-users@lists.boost.org> 抄送: Mateusz Loskot <mateusz@loskot.net> 主题: Re: [Boost-users] boost.gil build failed with GCC11 and -std=c++20 On Fri, 7 Jan 2022, 15:25 Qiang Ren via Boost-users, <boost-users@lists.boost.org<mailto:boost-users@lists.boost.org>> wrote: Hi, I am on ubuntu 20.04, I have GCC9.4 and 10.3 and 11.1 installed. I found that when set "-std=c++20", with gcc11, boost.gil will failed to build. Here is the simple test cpp to reproduce the issue: #include <sstream> #include <boost/gil.hpp> #include <boost/gil/extension/io/png.hpp> namespace gil = boost::gil; int main() { gil::rgb8_image_t img; std::stringstream buf(std::ios::in | std::ios::out | std::ios::binary); gil::read_and_convert_image(buf, img, gil::png_tag{}); return 0; } the build command is: g++ -o test test_gcc11_gil.cc -std=c++20 -I${THIRD_PARTY}/boost/boost_1_78_0 -L${THIRD_PARTY}/libpng/1.6.37/lib/ -lpng If replaced '-std=c++20' with '-std=c++17', the build would be OK, but with 'c++20', gcc 11 failed with the following errors: In file included from /data/lin/ThirdParty/boost/boost_1_78_0/boost/gil/extension/io/png/read.hpp:13, from /data/lin/ThirdParty/boost/boost_1_78_0/boost/gil/extension/io/png.hpp:11, from test_gcc11_gil.cc:3: /data/lin/ThirdParty/boost/boost_1_78_0/boost/gil/extension/io/png/tags.hpp:576:32: error: expected unqualified-id before ‘)’ token 576 | image_read_info< png_tag >() | ^ https://github.com/boostorg/gil/issues/616 Best regards, Mateusz <https://lists.boost.org/mailman/listinfo.cgi/boost-users>