https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115482
Bug ID: 115482
Summary: print.cc fails with avrlibc
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: dv at vollmann dot ch
Target Milestone: ---
Created attachment 58421
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58421&action=edit
A workaround that worked for me
avrlibc has an incomplete unistd.h that doesn't have isatty.
So building libstdc++ fails when compiling c++23/print.cc.
As a workaround I added a check for AVR.
With this workaround (and the patch from 115481) libstdc++ build for me with
AVR-LIBC 2.2.0:
../../src/gcc/configure \
--prefix=/opt/avr \
--target=avr \
--enable-languages=c,c++ \
--with-dwarf2 \
--enable-multilib \
--enable-libstdcxx \
--disable-decimal-float \
--disable-libffi \
--disable-libgomp \
--disable-libmudflap \
--disable-libquadmath \
--disable-libssp \
--disable-libstdcxx-pch \
--disable-nls \
--without-included-gettext \
--disable-libstdcxx-verbose \
--disable-shared \
--disable-threads \
--disable-tls \
--disable-plugin \
--with-system-zlib \
--with-headers=yes \
--with-gnu-as \
--with-gnu-ld \
--with-avrlibc
