Dear experts... I'm having troubles building GCC 10.3.0 (and a few older versions) with the newer one. The system is Fedora release 34 (Thirty Four), x86_64. The installed gcc version is: gcc (GCC) 11.1.1 20210428 (Red Hat 11.1.1-1) I downloaded gcc-10.3.0.tar.xz and expand it, and then did `../gcc-10.3.0/configure --prefix=/usr/local/gcc/10.3.0` from another directory, and `make`. The make failed as the following (the same occured for 10.2.0, 10.1.0, and 9.4.0). ... make[7]: Entering directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3' make "AR_FLAGS=rc" "CC_FOR_BUILD=gcc" "CC_FOR_TARGET=/home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/xgcc -B/home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/" "CFLAGS=-g -O2 -m32" "CXXFLAGS=-g -O2 -D_GNU_SOURCE -m32" "CFLAGS_FOR_BUILD=-g -O2" "CFLAGS_FOR_TARGET=-g -O2" "INSTALL=/usr/bin/install -c" "INSTALL_DATA=/usr/bin/install -c -m 644" "INSTALL_PROGRAM=/usr/bin/install -c" "INSTALL_SCRIPT=/usr/bin/install -c" "LDFLAGS=-m32" "LIBCFLAGS=-g -O2 -m32" "LIBCFLAGS_FOR_TARGET=-g -O2" "MAKE=make" "MAKEINFO=makeinfo --split-size=5000000 --split-size=5000000 --split-size=5000000 " "SHELL=/bin/sh" "RUNTESTFLAGS=" "exec_prefix=/usr/local/gcc/10.3.0" "infodir=/usr/local/gcc/10.3.0/share/info" "libdir=/usr/local/gcc/10.3.0/lib" "includedir=/usr/local/gcc/10.3.0/include" "prefix=/usr/local/gcc/10.3.0" "tooldir=/usr/local/gcc/10.3.0/x86_64-pc-linux-gnu" "gxx_include_dir=/usr/local/gcc/10.3.0/include/c++/10.3.0" "AR=ar" "AS=/home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/as" "LD=/home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/collect-ld" "RANLIB=ranlib" "NM=/home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/nm" "NM_FOR_BUILD=" "NM_FOR_TARGET=nm" "DESTDIR=" "WERROR=" all-recursive make[8]: Entering directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3' Making all in include make[9]: Entering directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include' mkdir -p ./x86_64-pc-linux-gnu/bits/stdc++.h.gch /home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/xgcc -shared-libgcc -B/home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc -nostdinc++ -L/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/src -L/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs -L/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/libsupc++/.libs -B/usr/local/gcc/10.3.0/x86_64-pc-linux-gnu/bin/ -B/usr/local/gcc/10.3.0/x86_64-pc-linux-gnu/lib/ -isystem /usr/local/gcc/10.3.0/x86_64-pc-linux-gnu/include -isystem /usr/local/gcc/10.3.0/x86_64-pc-linux-gnu/sys-include -fno-checking -m32 -x c++-header -nostdinc++ -g -O2 -D_GNU_SOURCE -m32 -I/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include/x86_64-pc-linux-gnu -I/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include -I/home/furutaka/work/gcc/gcc-10.3.0/libstdc++-v3/libsupc++ -O2 -g -std=gnu++0x /home/furutaka/work/gcc/gcc-10.3.0/libstdc++-v3/include/precompiled/stdc++.h \ -o x86_64-pc-linux-gnu/bits/stdc++.h.gch/O2ggnu++0x.gch /home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/cc1plus: /home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /home/furutaka/work/gcc/gcc-10.3.0-bld/./gcc/cc1plus) make[9]: *** [Makefile:1824: x86_64-pc-linux-gnu/bits/stdc++.h.gch/O2ggnu++0x.gch] Error 1 make[9]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3/include' make[8]: *** [Makefile:563: all-recursive] Error 1 make[8]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3' make[7]: *** [Makefile:488: all] Error 2 make[7]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/32/libstdc++-v3' make[6]: *** [Makefile:856: multi-do] Error 1 make[6]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/libstdc++-v3' make[5]: *** [Makefile:824: all-multi] Error 2 make[5]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/libstdc++-v3' make[4]: *** [Makefile:563: all-recursive] Error 1 make[4]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/libstdc++-v3' make[3]: *** [Makefile:488: all] Error 2 make[3]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/libstdc++-v3' make[2]: *** [Makefile:19986: all-stage1-target-libstdc++-v3] Error 2 make[2]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld' make[1]: *** [Makefile:28047: stage1-bubble] Error 2 make[1]: Leaving directory '/home/furutaka/work/gcc/gcc-10.3.0-bld' make: *** [Makefile:1007: all] Error 2 It seems to me that at some point of the build, for some reasons the already installed libstdc++ which contain GLIBCXX_3.4.29 was referenced or used in the currently building system... [furutaka@peart-furu-or-jp gcc-10.3.0-bld]$ strings /home/furutaka/work/gcc/gcc-10.3.0-bld/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6 | grep "^GLIBCXX_3.4.2." | sort | uniq GLIBCXX_3.4.20 GLIBCXX_3.4.21 GLIBCXX_3.4.22 GLIBCXX_3.4.23 GLIBCXX_3.4.24 GLIBCXX_3.4.25 GLIBCXX_3.4.26 GLIBCXX_3.4.27 GLIBCXX_3.4.28 [furutaka@peart-furu-or-jp gcc-10.3.0-bld]$ strings /lib64/libstdc++.so.6 | grep "^GLIBCXX_3.4.2." | sort | uniq GLIBCXX_3.4.20 GLIBCXX_3.4.21 GLIBCXX_3.4.22 GLIBCXX_3.4.23 GLIBCXX_3.4.24 GLIBCXX_3.4.25 GLIBCXX_3.4.26 GLIBCXX_3.4.27 GLIBCXX_3.4.28 GLIBCXX_3.4.29 How do I fix this? Thanks in advance... Kazuyoshi -- Kazuyoshi Furutaka furutaka@xxxxxxxxxxxxxxxx
