Trying to build 3.1.1 on Solaris 10 (update 8) so I can enable SQL support. I've installed the required version of gcc, bison, flex, and etc.. per the INSTALL doc. Here is the error I get: (I've searched google all morning and find tons of others with this error but no solution) ./configure --prefix=/usr/local --enable-sql --enable-pcre checking for pkg-config... /bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for a BSD-compatible install... /usr/local/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /usr/local/bin/mkdir -p checking for gawk... no checking for mawk... no checking for nawk... nawk checking whether make sets $(MAKE)... yes checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking dependency style of gcc... (cached) gcc3 checking for gcc option to accept ISO C99... -std=gnu99 checking for bison... bison -y checking for flex... flex checking lex output file root... configure: error: cannot find output from flex; giving up I am using the following environment vars: CXX=g++ CFLAGS=-I/usr/local/include CPPFLAGS=-I/usr/local/include CC=gcc All my open source tools are under /usr/local. I have tried have /usr/ccs/bin in my PATH before /yusr/local/bin, tried having it after, and tried not having it in my PATH at all. Anyone have any ideas? Thx, CC