docs: document how to enable GMT_VER_5 macro in cmake

ut-beg-texnet · Sep 20, 2022 · 678b448 · 678b448
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diff --git a/README.md b/README.md
@@ -47,6 +47,19 @@ cmake .
 make
 ```
 
+To build program compatible with GMT 5.x or 6.x:
+edit CMakeLists.txt to uncomment following line:
+```
+add_compile_options(-D GMT_VER_5)
+```
+then:
+```
+cd src
+rm CMakeCache.txt
+cmake .
+make
+```
+
 Thanks to Gilles Celli (European Center for Geodynamics and Seismology) for creating and debugging the NonLinLoc CMake build system.
 
 

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -39,6 +39,12 @@ add_compile_options(-fcommon)
 # export CFLAGS='-D _GNU_SOURCE'
 # before running: rm CMakeCache.txt; cmake .
 
+# 20220921 Sean Ho - Uncomment the following if you want Grid2GMT to generate scripts compatible with gmt 5.x or 6.x
+#add_compile_options(-D GMT_VER_5)
+#
+# Alternatively, in the make environment, set:
+# export CFLAGS='-D GMT_VER_5'
+# before running: rm CMakeCache.txt; cmake .
 
 # 20211110 AJL - New fix implemented, see https://github.com/alomax/NonLinLoc/issues/7
 #   This fix probably supersedes the following: