Add longoptions support for gmtmath. (#8000)

* Add longoptions support for gmtmath.

* Update gmtmath_inc.h

---------

Co-authored-by: Paul Wessel <pwessel@hawaii.edu>

src/longopt/gmtmath_inc.h

@@ -24,33 +24,22 @@ static struct GMT_KEYWORD_DICTIONARY module_kw[] = {
 	/* separator, short_option, long_option,
 	          short_directives,    long_directives,
 	          short_modifiers,     long_modifiers */
-	{ 0, 'A', "",
+	{ 0, 'A', "init|matrix",
 	          "",                  "",
+	          "e,r,s,w",           "evaluate,no_left,sigma,weights" },
+	{ 0, 'C', "columns",           "", "", "", "" },
+	{ 0, 'E', "eigen",             "", "", "", "" },
+	{ 0, 'I', "invert|reverse",    "", "", "", "" },
+	{ 0, 'N', "ncolumns",          "", "", "", "" },
+	{ 0, 'Q', "quick",
+	          "c,i,p,n",           "cm|centimeter,inch,point,none",
 	          "",                  "" },
-	{ 0, 'C', "",
-	          "",                  "",
-	          "",                  "" },
-	{ 0, 'E', "",
-	          "",                  "",
-	          "",                  "" },
-	{ 0, 'I', "",
-	          "",                  "",
-	          "",                  "" },
-	{ 0, 'L', "",
-	          "",                  "",
+	{ 0, 'S', "output",
+	          "f,l",               "first,last",
 	          "",                  "" },
-	{ 0, 'N', "",
+	{ 0, 'T', "range|series",
 	          "",                  "",
-	          "",                  "" },
-	{ 0, 'Q', "",
-	          "",                  "",
-	          "",                  "" },
-	{ 0, 'S', "",
-	          "",                  "",
-	          "",                  "" },
-	{ 0, 'T', "",
-	          "",                  "",
-	          "",                  "" },
+	          "b,l,i,n",           "log2,log10,inverse,number" },
 	{ 0, '\0', "", "", "", "", ""}  /* End of list marked with empty option and strings */
 };
 #endif  /* !GMTMATH_INC_H */