https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90337
--- Comment #5 from Fazal Majid <gcc at sentfrom dot com> --- Yet another compile issue: mordac ~/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libsanitizer/sanitizer_common>/bin/ksh ../libtool --tag=CXX --mode=compile /home/majid/build/gcc-9.1.0/obj/./gcc/xgcc -shared-libgcc -B/home/majid/build/gcc-9.1.0/obj/./gcc -nostdinc++ -L/home/majid/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libstdc++-v3/src -L/home/majid/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libstdc++-v3/src/.libs -L/home/majid/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libstdc++-v3/libsupc++/.libs -B/usr/local/x86_64-pc-solaris2.11/bin/ -B/usr/local/x86_64-pc-solaris2.11/lib/ -isystem /usr/local/x86_64-pc-solaris2.11/include -isystem /usr/local/x86_64-pc-solaris2.11/sys-include -fchecking=1 -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -DHAVE_RPC_XDR_H=1 -DHAVE_TIRPC_RPC_XDR_H=0 -I. -I../../../../libsanitizer/sanitizer_common -I.. -I ../../../../libsanitizer/include -isystem ../../../../libsanitizer/include/system -Wall -W -Wno-unused-parameter -Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin -fno-exceptions -fno-rtti -fomit-frame-pointer -funwind-tables -fvisibility=hidden -Wno-variadic-macros -I../../libstdc++-v3/include -I../../libstdc++-v3/include/x86_64-pc-solaris2.11 -I../../../../libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11 -DSANITIZER_LIBBACKTRACE -DSANITIZER_CP_DEMANGLE -I ../../../../libsanitizer/../libbacktrace -I ../libbacktrace -I ../../../../libsanitizer/../include -include ../../../../libsanitizer/libbacktrace/backtrace-rename.h -g -O2 -MT sanitizer_posix_libcdep.lo -MD -MP -MF .deps/sanitizer_posix_libcdep.Tpo -c -o sanitizer_posix_libcdep.lo ../../../../libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cc libtool: compile: /home/majid/build/gcc-9.1.0/obj/./gcc/xgcc -shared-libgcc -B/home/majid/build/gcc-9.1.0/obj/./gcc -nostdinc++ -L/home/majid/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libstdc++-v3/src -L/home/majid/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libstdc++-v3/src/.libs -L/home/majid/build/gcc-9.1.0/obj/x86_64-pc-solaris2.11/libstdc++-v3/libsupc++/.libs -B/usr/local/x86_64-pc-solaris2.11/bin/ -B/usr/local/x86_64-pc-solaris2.11/lib/ -isystem /usr/local/x86_64-pc-solaris2.11/include -isystem /usr/local/x86_64-pc-solaris2.11/sys-include -fchecking=1 -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -DHAVE_RPC_XDR_H=1 -DHAVE_TIRPC_RPC_XDR_H=0 -I. -I../../../../libsanitizer/sanitizer_common -I.. -I ../../../../libsanitizer/include -isystem ../../../../libsanitizer/include/system -Wall -W -Wno-unused-parameter -Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin -fno-exceptions -fno-rtti -fomit-frame-pointer -funwind-tables -fvisibility=hidden -Wno-variadic-macros -I../../libstdc++-v3/include -I../../libstdc++-v3/include/x86_64-pc-solaris2.11 -I../../../../libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11 -DSANITIZER_LIBBACKTRACE -DSANITIZER_CP_DEMANGLE -I ../../../../libsanitizer/../libbacktrace -I ../libbacktrace -I ../../../../libsanitizer/../include -include ../../../../libsanitizer/libbacktrace/backtrace-rename.h -g -O2 -MT sanitizer_posix_libcdep.lo -MD -MP -MF .deps/sanitizer_posix_libcdep.Tpo -c ../../../../libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cc -fPIC -DPIC -o .libs/sanitizer_posix_libcdep.o ../../../../libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cc: In function 'void __sanitizer::ReleaseMemoryPagesToOS(__sanitizer::uptr, __sanitizer::uptr)': ../../../../libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cc:66:5: error: 'madvise' was not declared in this scope 66 | madvise((char *)beg_aligned, end_aligned - beg_aligned, | ^~~~~~~ That's because with these settings /usr/include/mman.h defines posix_madvise() but not advise().