Updated build flags.

Author: interkosmos

Makefile

@@ -5,7 +5,7 @@ FC      = gfortran
 PREFIX  = /usr/local
 
 DEBUG   = -g -O0 -Wall -fmax-errors=1
-RELEASE = -O2 -march=native
+RELEASE = -O2
 
 FFLAGS  = $(RELEASE)
 LDFLAGS = -I$(PREFIX)/include -L$(PREFIX)/lib

README.md

@@ -108,8 +108,8 @@ program main
 end program main
 ```
 
-If the library is installed to `/opt`, then compile, link, and run the program
-with:
+If the library has been installed to `/opt`, then compile, link, and run the
+program with:
 
 ```
 $ gfortran -I/opt/include/libfortran-pcre2 -o example example.f90 /opt/lib/libfortran-pcre2.a -lpcre2-8