Removing all OpenMP

Makefile.am

@@ -37,8 +37,7 @@ SUBDIRS := src/smithlab_cpp
 install installdirs: SUBDIRS := $(filter-out src/smithlab_cpp, $(SUBDIRS))
 AM_CPPFLAGS = -I $(top_srcdir)/src/smithlab_cpp -I $(top_srcdir)/src/bamxx
 
-AM_CXXFLAGS = $(OPENMP_CXXFLAGS)
-AM_CXXFLAGS += -Wall -Wextra -Wpedantic -Wno-unknown-attributes
+AM_CXXFLAGS = -Wall -Wextra -Wpedantic -Wno-unknown-attributes
 if ENABLE_SHORT
 AM_CXXFLAGS += -DENABLE_SHORT
 endif

README.md

@@ -17,13 +17,10 @@ See how to [get started](https://github.com/smithlabcode/abismal/blob/master/doc
 
 ### Requirements ###
 
-Currently abismal requires a C++ compiler that supports the C++11
-standard and OpenMP. The default compiler assumed is g++ (comes with
-GCC, available on your Linux or macOS machine). The g++ compiler has
-supported the C++11 standard since roughly 2012 (GCC 4.7) so this
-should not cause any problems. It also requires an OMP library and
-headers to be available, which rarely causes problems. Instructions to
-get HTSlib, for macOS or Linux systems, can be found below.
+Currently abismal requires a C++ compiler. The default compiler
+assumed is g++ (comes with GCC, available on your Linux or macOS
+machine). HTSlib is also required. Instructions to get HTSlib, for
+macOS or Linux systems, can be found below.
 
 If you have trouble with the `make` part of the installation procedure
 described below, please contact us via e-mail or through a [GitHub

configure.ac

@@ -43,18 +43,6 @@ and headers can be found.
 dnl check for required libraries
 AC_SEARCH_LIBS([hts_version], [hts], [], [AC_MSG_FAILURE([$hts_fail_msg])])
 
-
-dnl OpenMP happens here
-AC_OPENMP([C++])
-AS_VAR_IF(OPENMP_CXXFLAGS, [], [
-dnl check for the OpenMP library; can't be later
-AC_SEARCH_LIBS([omp_get_num_threads], [gomp omp], [],
-               [AC_MSG_FAILURE([OpenMP library not found])])
-dnl now we get setup for the right OpenMP flags
-ADS_OPENMP([], [AC_MSG_FAILURE([OpenMP must be installed to build abismal])])
-])dnl end of OpenMP stuff
-
-
 dnl Optimize for shorter reads by compiling with a smaller window when
 dnl making the index. When abismal loads the index, it compares the
 dnl value with a constant so abismalidx and abismal must both be