Description:
------------
For some reason, configure invokes $CC with -lstdc++ (among other libraries), which causes a problem with Sun's C-compiler -- the library should only be used with a C++ compiler... I guess, GNU C just finds it anyway, but that should not be relied upon...

configure:117875: checking for long int
configure:117905: cc -c -I/opt/csw/include -xstrconst -xO3 -xarch=sparcfmaf -fma=fused -m32 -xmemalign=8s  -D_POSIX_PTHREAD_SEMANTICS
 conftest.c >&5
configure:117911: $? = 0
configure:117926: result: yes
configure:117933: checking size of long int
configure:118235: cc -o conftest -I/opt/csw/include -xstrconst -xO3 -xarch=sparcfmaf -fma=fused -m32 -xmemalign=8s  -D_POSIX_PTHREAD_
SEMANTICS -L/opt/csw/lib  -L/usr/ucblib -L/opt/csw/lib -L/usr/sfw/lib conftest.c -lreadline -lncurses -laspell -lpspell -lstdc++ -lgm
p -lintl -lcurl -lbz2 -lz -lrt -lm -lnsl -lsocket  -lxml2 -lz -lm -lsocket -lnsl -lssl -lcrypto -lsocket -lnsl -ldl -lcurl -lidn -lss
l -lcrypto -llber -lldap -lsocket -lnsl -lz -lssl -lcrypto -lsocket -lnsl -ldl -lm -licui18n -licuuc -licudata -lm -licuio -lxml2 -lz
 -lm -lsocket -lnsl >&5
"conftest.c", line 540: warning: statement not reached
configure:118238: $? = 0
configure:118244: ./conftest
ld.so.1: conftest: fatal: libstdc++.so.6: open failed: No such file or directory
./configure: line 118245:  5239 Killed                  ./conftest$ac_exeext
configure:118247: $? = 137
configure: program exited with status 137

Why does it bother with libstdc++ at all?

Test script:
---------------
+ CC=cc
+ CXX=CC
+ CFLAGS='-xstrconst -xO3'
+ CFLAGS='-xstrconst -xO3 -xarch=sparcfmaf -fma=fused -m32'
+ CURL_DIR=/opt/csw
+ export CURL_DIR
+ IMAP_DIR=/opt/csw
+ export IMAP_DIR
+ IMAP_INC_DIR=/opt/csw/include/imap
+ export IMAP_INC_DIR
+ export CC
+ export CXX
+ export CFLAGS
+ CFLAGS='-xstrconst -xO3 -xarch=sparcfmaf -fma=fused -m32'
+ export CFLAGS
+ CXXFLAGS=%cxx_optflags
+ export CXXFLAGS
+ FFLAGS='-O2 -g -pipe'
+ export FFLAGS
+ ./configure --host=sparc-sun-solaris2.10 --build=sparc-sun-solaris2.10 --target=sparc-sun-solaris2.10 --program-prefix= --prefix=/data/timeinc/packages/ti_php54 --exec-prefix=/data/timeinc/packages/ti_php54 --bindir=/data/timeinc/packages/ti_php54/bin --sbindir=/data/timeinc/packages/ti_php54/sbin --sysconfdir=/data/timeinc/packages/ti_php54/etc --datadir=/data/timeinc/packages/ti_php54/share --includedir=/data/timeinc/packages/ti_php54/include --libdir=/data/timeinc/packages/ti_php54/lib --libexecdir=/data/timeinc/packages/ti_php54/libexec --localstatedir=/data/timeinc/packages/ti_php54/var --sharedstatedir=/data/timeinc/packages/ti_php54/com --mandir=/data/timeinc/packages/ti_php54/share/man --infodir=/data/timeinc/packages/ti_php54/share/info --prefix=/data/timeinc/packages/ti_php54 --cache-file=../config.cache --with-libdir=lib --mandir=/data/timeinc/man/ --with-config-file-path=/data/timeinc/packages/ti_php54/etc --with-config_file-scan-dir=/data/timeinc/packages/ti_php54/php.d --disable-debug --with-pic --disable-rpath --with-pear=/data/timeinc/packages/ti_php54/pear --with-bz2 --with-curl --enable-gd-native-ttf --with-jpeg-dir=/usr --with-xpm-dir=/usr --without-gdbm --with-gettext --with-gmp --with-mhash --with-iconv --with-openssl --with-kerberos --with-pspell --with-zlib --with-layout=GNU --enable-exif --enable-ftp --enable-magic-quotes --enable-sockets --enable-sysvsem --enable-sysvshm --enable-sysvmsg --enable-wddx --enable-ucd-snmp-hack --with-unixODBC=shared --enable-shmop --enable-calendar --with-tidy=shared --with-mcrypt=shared --with-sqlite3=shared --enable-intl --sysconfdir=/data/timeinc/packages/ti_php54/etc --disable-ipv6 --enable-pcntl --with-imap=shared --with-imap-ssl --enable-mbstring=shared --enable-mbregex --with-gd=shared --enable-bcmath=shared --enable-dba=shared --with-xmlrpc=shared --with-ldap=shared --with-ldap-sasl --with-mysql=shared,/opt/csw --with-mysqli=shared,/opt/csw/bin/mysql_config --with-pdo-mysql=shared,/opt/csw --enable-dom=shared --with-pgsql=shared --with-sybase-ct=shared,/data/timeinc/packages/ti_sybase_ocs/OCS-15_0 --with-snmp=shared --enable-soap=shared --with-xsl=shared --enable-xmlreader=shared --enable-xmlwriter=shared --enable-pdo=shared --with-pdo-odbc=shared,unixODBC --with-pdo-pgsql=shared --with-pdo-sqlite=shared --enable-json=shared --enable-zip=shared --disable-ipv6 --with-readline
configure: creating cache ../config.cache
checking for grep that handles long lines and -e... /usr/sfw/bin/ggrep
...
checking for Sybase-CT support... yes, shared
checking for long int... yes
checking size of long int... configure: error: cannot compute sizeof (long int)
See `config.log' for more details.