diff --git a/configure.ac b/configure.ac
index c251661..d66711c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -62,9 +62,7 @@ case "${host_os}" in
 		SHLIB_SUFFIX=so
 		AC_DEFINE(LINUX, 1, if compiling on Linux)
 		;;
-     *solaris*) # set compile flags for Solaris
-		CPPFLAGS="${CPPFLAGS} -D_POSIX_C_SOURCE=199506L -D_XPG4_2 -D_XPG5 -D__EXTENSIONS__"
-		# for checking for some network functions on Solaris
+     *solaris*) # for checking for some network functions on Solaris
 		LDFLAGS="$LDFLAGS -lnsl"
 		# assume we are using CC if not using g++, add -norunpath to link flags in this case
 		if test "$GXX" != "yes"; then
@@ -251,11 +249,7 @@ else
 		fi
 		;;
      *solaris*) if test "$GXX" = "yes"; then
-		    if test "$host_cpu" = "sparc"; then
-		        CXXFLAGS="$CXXFLAGS -mcpu=v8 -m32"
-		    else
-		        CXXFLAGS="$CXXFLAGS -m32"
-		    fi
+		    CXXFLAGS="$CXXFLAGS -m32"
 		else
 		    CXXFLAGS="$CXXFLAGS -xarch=generic"
 		fi