inside RPM:
+ env
REMOTEHOST=atrejus
RPM_OPT_FLAGS=-O2 -fsigned-char
HOSTNAME=radagast
SHELL=/bin/bash
TERM=vt100
HISTSIZE=1000
RPM_PACKAGE_RELEASE=1mk
GNUSTEP_LOCAL_ROOT=/usr/GNUstep/Local
OLDPWD=/usr/src/redhat/BUILD
GNUSTEP_HOST=powerpc-unknown-linux-gnu
RPM_PACKAGE_NAME=gnustep-base
RPM_SOURCE_DIR=/usr/src/redhat/SOURCES
HISTFILESIZE=1000
USER=multix
LS_COLORS=no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=01;32:*.cmd=01;32:*.exe=01;32:*.com=01;32:*.btm=01;32:*.bat=01;32:*.sh=01;32:*.csh=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tz=01;31:*.rpm=01;31:*.cpio=01;31:*.jpg=01;35:*.gif=01;35:*.bmp=01;35:*.xbm=01;35:*.xpm=01;35:*.png=01;35:*.tif=01;35:
GUILE_LOAD_PATH=/home/multix/GNUstep/Library/Libraries/Guile:/usr/GNUstep/Local/Library/Libraries/Guile:/usr/GNUstep/System/Library/Libraries/Guile
GNUSTEP_NETWORK_ROOT=/usr/GNUstep/Local
GNUSTEP_MAKEFILES=/usr/GNUstep/System/Library/Makefiles
GNUSTEP_ROOT=/usr/GNUstep
GNUSTEP_FLATTENED=yes
USERNAME=
GNUSTEP_HOST_OS=linux-gnu
GNUSTEP_HOST_VENDOR=unknown
MAIL=/var/spool/mail/multix
PATH=/home/multix/GNUstep/Tools:/usr/GNUstep/Local/Tools:/usr/GNUstep/System/Tools:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/home/multix/bin
INPUTRC=/etc/inputrc
PWD=/usr/src/redhat/BUILD/gnustep-base-1.9.2
RPM_BUILD_ROOT=/var/tmp/gnustep-base-buildroot
RPM_PACKAGE_VERSION=1.9.2
RPM_OS=linux
GNUSTEP_HOST_CPU=powerpc
RPM_DOC_DIR=/usr/share/doc
SHLVL=3
HOME=/root
GNUSTEP_USER_ROOT=/home/multix/GNUstep
GNUSTEP_SYSTEM_ROOT=/usr/GNUstep/System
BASH_ENV=/home/multix/.bashrc
LOGNAME=multix
GNUSTEP_PATHLIST=/home/multix/GNUstep:/usr/GNUstep/Local:/usr/GNUstep/System
CLASSPATH=/home/multix/GNUstep/Library/Libraries/Java:/usr/GNUstep/Local/Library/Libraries/Java:/usr/GNUstep/System/Library/Libraries/Java
RPM_BUILD_DIR=/usr/src/redhat/BUILD
LIBRARY_COMBO=gnu-gnu-gnu
RPM_ARCH=ppc
mc=() {  mkdir -p $HOME/.mc/tmp 2>/dev/null;
 chmod 700 $HOME/.mc/tmp;
 MC=$HOME/.mc/tmp/mc-$$;
 /usr/bin/mc -P "$@" >"$MC";
 cd "`cat $MC`";
 rm -f "$MC";
 unset MC
}
_=/usr/bin/env
+ '[' YES = YES ']'
+ CFLAGS=-O2 -fsigned-char
+ ./configure


inside a normal shell:
REMOTEHOST=atrejus
HOSTNAME=radagast
SHELL=/bin/bash
TERM=vt100
HISTSIZE=1000
GNUSTEP_LOCAL_ROOT=/usr/GNUstep/Local
OLDPWD=/usr/src/redhat/BUILD
GNUSTEP_HOST=powerpc-unknown-linux-gnu
HISTFILESIZE=1000
USER=multix
LS_COLORS=no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=01;32:*.cmd=01;32:*.exe=01;32:*.com=01;32:*.btm=01;32:*.bat=01;32:*.sh=01;32:*.csh=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tz=01;31:*.rpm=01;31:*.cpio=01;31:*.jpg=01;35:*.gif=01;35:*.bmp=01;35:*.xbm=01;35:*.xpm=01;35:*.png=01;35:*.tif=01;35:
LD_LIBRARY_PATH=/home/multix/GNUstep/Library/Libraries:/usr/GNUstep/Local/Library/Libraries:/usr/GNUstep/System/Library/Libraries
GUILE_LOAD_PATH=/home/multix/GNUstep/Library/Libraries/Guile:/usr/GNUstep/Local/Library/Libraries/Guile:/usr/GNUstep/System/Library/Libraries/Guile
GNUSTEP_NETWORK_ROOT=/usr/GNUstep/Local
GNUSTEP_MAKEFILES=/usr/GNUstep/System/Library/Makefiles
GNUSTEP_ROOT=/usr/GNUstep
GNUSTEP_FLATTENED=yes
USERNAME=
GNUSTEP_HOST_OS=linux-gnu
GNUSTEP_HOST_VENDOR=unknown
MAIL=/var/spool/mail/multix
PATH=/home/multix/GNUstep/Tools:/usr/GNUstep/Local/Tools:/usr/GNUstep/System/Tools:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/home/multix/bin
INPUTRC=/etc/inputrc
PWD=/usr/src/redhat/BUILD/gnustep-base-1.9.2
GNUSTEP_HOST_CPU=powerpc
PS1=[\u@\h \W]\$ 
SHLVL=1
HOME=/home/multix
GNUSTEP_USER_ROOT=/home/multix/GNUstep
GNUSTEP_SYSTEM_ROOT=/usr/GNUstep/System
BASH_ENV=/home/multix/.bashrc
LOGNAME=multix
GNUSTEP_PATHLIST=/home/multix/GNUstep:/usr/GNUstep/Local:/usr/GNUstep/System
CLASSPATH=/home/multix/GNUstep/Library/Libraries/Java:/usr/GNUstep/Local/Library/Libraries/Java:/usr/GNUstep/System/Library/Libraries/Java
LIBRARY_COMBO=gnu-gnu-gnu
mc=() {  mkdir -p $HOME/.mc/tmp 2>/dev/null;
 chmod 700 $HOME/.mc/tmp;
 MC=$HOME/.mc/tmp/mc-$$;
 /usr/bin/mc -P "$@" >"$MC";
 cd "`cat $MC`";
 rm -f "$MC";
 unset MC
}
_=/usr/bin/env