back out of compiler optimization level settings

Author: stevencarlislewalker

CONTRIBUTING.md

@@ -70,10 +70,6 @@ When you attempt to use functions from `TMB` when adding an engine function, you
 
 We are [targeting support](https://github.com/canmod/macpan2/issues/125#issuecomment-1789434800) for both `C++14` and `C++17`. This means, for example, that we cannot use [variants](https://en.cppreference.com/w/cpp/utility/variant) because they were introduced in `C++17`.
 
-## `C++` Compiler Optimization Level
-
-The compiler optimization level, as well as other compiler flags, can be set in the `src/Makevars` file. We should keep it at level two (i.e., `-O2`) because it generally leads to much better run-time performance, although sometimes you might want to reduce compilation times during development by turning off optimization (i.e., `-O0`).
-
 ## Adding Engine Functions
 
 If you need a function for defining model simulations that is not [currently supported by the C++ TMB engine](https://canmod.github.io/macpan2/reference/engine_functions), here is how you can add one.

Makefile

@@ -1,6 +1,3 @@
-export R_MAKEVARS_USER := $(PWD)/src/Makevars
-
-
 COMMA_RE = ^\([, ]*\)
 ENUM_RE = [ ]*MP2_[A-Z_]*[ ]*=[ ]*[0-9][0-9]*
 SED_RE = \(\,\)*[ ]*\/\/[ ]*\(.*\)
@@ -36,10 +33,6 @@ full-install:
 # haven't updated macpan.cpp (but have perhaps modified dev.cpp)
 # and (3) do not require a roxygen update.
 quick-install: enum-update enum-meth-update
-	@echo "========"
-	@echo "Contents of $(R_MAKEVARS_USER):"
-	@cat $(R_MAKEVARS_USER)
-	@echo "========"
 	R CMD INSTALL --no-multiarch --install-tests .
 
 

src/Makevars

@@ -1,2 +1 @@
 PKG_CPPFLAGS=-DTMBAD_FRAMEWORK
-CXXFLAGS = -g -O2