GCC Build fails to find installed Glibc at Stage 2 of bootstrapping

GCC Build fails to find installed Glibc at Stage 2 of bootstrapping

[rubisetcie]

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Hello everyone.

I'm trying to build a native GCC from source on Debian, but I encounter a
problem at the last step:
At the configuring step of *stage 2* bootstrapping, GCC *can't find the
glibc headers / libs* that I have previously compiled and installed
anymore...

configure:6847: result: no
configure:6863: checking for uintmax_t
configure:6863:  /home/rubisetcie/apps/gcc-build/./prev-gcc/xg++
-B/home/rubisetcie/apps/gcc-build/./prev-gcc/
-B/usr/local/custom-gcc/x86_64-pc-linux-gnu/bin/ -nostdinc++
-B/home/rubisetcie/apps/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/home/rubisetcie/apps/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
 -I/home/rubisetcie/apps/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
 -I/home/rubisetcie/apps/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
 -I/home/rubisetcie/apps/gcc-13.2.0/libstdc++-v3/libsupc++
-L/home/rubisetcie/apps/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/home/rubisetcie/apps/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-c -g -O2 -fno-checking -gtoggle  conftest.cpp >&5
conftest.cpp:23:10: fatal error: stdio.h: No such file or directory
   23 | #include <stdio.h>

Here are my configure commands for the whole toolchain I'm trying to build:

   - *Binutils:* ./configure --prefix=/usr/local/custom-gcc
   --disable-multilib --disable-gprofng --enable-lto --enable-libssp
   --enable-ld=yes --enable-gold=yes --with-system-zlib
   - *GCC (First pass):* ./configure --prefix=/tmp/gcc-first-stage
   --disable-multilib --disable-nls --disable-headers --disable-threads
   --enable-version-specific-runtime-libs --enable-languages=c,c++,lto
   --with-newlib --with-ld=/usr/local/custom-gcc/bin/ld
   --with-as=/usr/local/custom-gcc/bin/as
   - *Glibc:* ./configure --prefix=/usr/local/custom-gcc
   --includedir="\${exec_prefix}/x86_64-pc-linux-gnu/include"
   --libdir="\${exec_prefix}/x86_64-pc-linux-gnu/lib" --without-selinux
   --with-headers=$HOME/apps/linux-headers/include
   CC=/tmp/gcc-first-stage/bin/gcc CXX=/tmp/gcc-first-stage/bin/g++
   - *GCC (Second pass):* ./configure --prefix=/usr/local/custom-gcc
   --disable-multilib --enable-version-specific-runtime-libs
   --enable-languages=c,c++,lto --enable-threads=posix --enable-lto
   --enable-libssp --enable-libgomp --with-ld=/usr/local/custom-gcc/bin/ld
   --with-as=/usr/local/custom-gcc/bin/as
   --with-native-system-header-dir=$HOME/apps/linux-headers/include
   --with-system-zlib --with-dwarf2

It is during the build of "GCC (Second pass)", at bootstrap stage 2, that
it fails to find the installed glibc.
Could you please tell me if I'm doing something wrong?

Thank you very much in advance,
Rubisetcie