message: rename STAN_COMPILER_OPTIMS to STAN_CPP_OPTIMS
diff: @@ -63,7 +63,7 @@ CXX_TYPE ?= other
  CXX_MAJOR := $(shell $(CXX) -dumpversion 2>&1 | cut -d'.' -f1)
  CXX_MINOR := $(shell $(CXX) -dumpversion 2>&1 | cut -d'.' -f2)
  -ifdef STAN_COMPILER_OPTIMS
  +ifdef STAN_CPP_OPTIMS
  ifeq (clang,$(CXX_TYPE))
  CXXFLAGS_OPTIM ?= -fvectorize -ftree-vectorize -fslp-vectorize -ftree-slp-vectorize -fno-standalone-debug -fstrict-return -funroll-loops
  ifeq ($(shell expr $(CXX_MAJOR) \>= 5), 1)
  @@ -185,7 +185,7 @@ endif
  @echo ' STANC2: When set, use bin/stanc2 to generate C++ code.'
  @echo ' STANC3_VERSION: When set, uses that tagged version specified; otherwise, downloads'
  @echo ' the nightly version.'
  - @echo ' STAN_COMPILER_OPTIMS: Turns on additonal compiler flags for performance '
  + @echo ' STAN_CPP_OPTIMS: Turns on additonal compiler flags for performance '
  @echo ''
  @echo ''
  @echo ' Example - bernoulli model: examples/bernoulli/bernoulli.stan'
  