Initial Solaris support

src/dtoa-config.c

Index: src/dtoa-config.c
diff --git a/src/dtoa-config.c b/src/dtoa-config.c
index a1acd2dd440ab645bbde4418cca91119c697983a..9c5ee331943a5001a2172356cb3e818accdfd811 100644
--- a/src/dtoa-config.c
+++ b/src/dtoa-config.c
@@ -38,7 +38,8 @@
  */
 
 #if !(defined(__APPLE__) && defined(__MACH__)) && \
-    !defined(WIN32) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
+    !defined(WIN32) && !defined(__FreeBSD__) && !defined(__OpenBSD__) && \
+    !defined(__sun)
 #include <endian.h>
 #endif
 #include <math.h>
@@ -47,7 +48,7 @@
 /* The floating point word order on ARM is big endian when floating point
  * emulation is used, even if the byte order is little endian */
 #if !(defined(__APPLE__) && defined(__MACH__)) && !defined(WIN32) && \
-    !defined(__FreeBSD__) && !defined(__OpenBSD__) && \
+    !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__sun) && \
     __FLOAT_WORD_ORDER == __BIG_ENDIAN
 #define  IEEE_MC68k
 #else
@@ -56,7 +57,7 @@
 
 #define __MATH_H__
 #if defined(__APPLE__) && defined(__MACH__) || defined(__FreeBSD__) || \
-    defined(__OpenBSD__)
+    defined(__OpenBSD__) || defined(__sun)
 /* stdlib.h on FreeBSD and Apple's 10.5 and later SDKs will mangle the
  * name of strtod.  If it's included after strtod is redefined as
  * gay_strtod, it will mangle the name of gay_strtod, which is