diff --git a/Makefile b/Makefile
index 3cfd9549c..f5907f937 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 # Makefile
 #
 # Field G. Van Zee
-# 
+#
 # Top-level makefile for libflame linear algebra library.
 #
 #
@@ -89,18 +89,18 @@ ALL_FLAMEC_DLL_NAME            := libflame.so
 MK_ALL_FLAMEC_LIB                     := $(BASE_LIB_DIR)/$(ALL_FLAMEC_LIB_NAME)
 MK_ALL_FLAMEC_DLL                     := $(BASE_LIB_DIR)/$(ALL_FLAMEC_DLL_NAME)
 
-MK_BASE_FLAMEC_SRC                    := 
-MK_BASE_FLAMEC_OBJS                   := 
+MK_BASE_FLAMEC_SRC                    :=
+MK_BASE_FLAMEC_OBJS                   :=
 
-MK_BLAS_FLAMEC_SRC                    := 
-MK_BLAS_FLAMEC_OBJS                   := 
+MK_BLAS_FLAMEC_SRC                    :=
+MK_BLAS_FLAMEC_OBJS                   :=
 
-MK_LAPACK_FLAMEC_SRC                  := 
-MK_LAPACK_FLAMEC_OBJS                 := 
+MK_LAPACK_FLAMEC_SRC                  :=
+MK_LAPACK_FLAMEC_OBJS                 :=
 
 
-MK_MAP_LAPACK2FLAMEC_SRC              := 
-MK_MAP_LAPACK2FLAMEC_OBJS             := 
+MK_MAP_LAPACK2FLAMEC_SRC              :=
+MK_MAP_LAPACK2FLAMEC_OBJS             :=
 
 MK_MAP_LAPACK2FLAMEC_F2C_SRC          :=
 MK_MAP_LAPACK2FLAMEC_F2C_OBJS         :=
@@ -111,8 +111,8 @@ MK_MAP_LAPACK2FLAMEC_F2C_FLAMEC_OBJS  :=
 MK_MAP_LAPACK2FLAMEC_F2C_INSTALL_SRC  :=
 MK_MAP_LAPACK2FLAMEC_F2C_INSTALL_OBJS :=
 
-MK_FLABLAS_F2C_SRC                    := 
-MK_FLABLAS_F2C_OBJS                   := 
+MK_FLABLAS_F2C_SRC                    :=
+MK_FLABLAS_F2C_OBJS                   :=
 
 # --- Define install target names for static libraries ---
 MK_FLAMEC_LIBS                    := $(MK_ALL_FLAMEC_LIB)
@@ -242,6 +242,7 @@ FFLAGS          := $(FFLAGS) $(INCLUDE_PATHS)
 # Convert source file paths to object file paths by replaying the base source
 # directory with the base object directory, and also replacing the source file
 # suffix (ie: '.c' or '.f') with '.o'.
+
 MK_FLABLAS_F2C_OBJS                   := $(patsubst $(SRC_DIR)/%.c, $(BASE_OBJ_DIR)/%.o, \
                                                     $(filter %.c, $(MK_FLABLAS_F2C_SRC)))
 
@@ -269,7 +270,7 @@ MK_MAP_LAPACK2FLAMEC_F2C_INSTALL_OBJS := $(patsubst $(SRC_DIR)/%.c, $(BASE_OBJ_D
 # Combine the base, blas, and lapack libraries.
 MK_ALL_FLAMEC_OBJS        := $(MK_BASE_FLAMEC_OBJS) \
                              $(MK_BLAS_FLAMEC_OBJS) \
-                             $(MK_LAPACK_FLAMEC_OBJS) 
+                             $(MK_LAPACK_FLAMEC_OBJS)
 
 # Prepend the flablas source code files, if requested
 
@@ -288,13 +289,13 @@ ifeq ($(FLA_ENABLE_LAPACK2FLAME),no)
 MK_FLABLAS_F2C_OBJS       := $(MK_MAP_LAPACK2FLAMEC_F2C_INSTALL_OBJS) \
                              $(MK_FLABLAS_F2C_OBJS)
 endif
-
 MK_ALL_FLAMEC_OBJS        := $(MK_FLABLAS_F2C_OBJS) \
                              $(MK_ALL_FLAMEC_OBJS)
 endif
 
 ### Kyungjoo 2015.10.21
-AR_CHUNK_SIZE=4096
+#AR_CHUNK_SIZE=4096
+AR_CHUNK_SIZE=1024
 
 #
 # --- Targets/rules ------------------------------------------------------------
@@ -373,20 +374,20 @@ endif
 
 # --- Static library archiver rules for libflame ---
 $(MK_ALL_FLAMEC_LIB): $(MK_ALL_FLAMEC_OBJS)
-
 ifeq ($(FLA_ENABLE_VERBOSE_MAKE_OUTPUT),yes)
 ifeq ($(FLA_ENABLE_MAX_ARG_LIST_HACK),yes)
 ### Kyungjoo 2015.10.21
 	$(CAT) $(AR_OBJ_LIST_FILE) | xargs -n$(AR_CHUNK_SIZE) $(AR) $(ARFLAGS) $@
-### Previous hack (works on linux, not on osx)
+### Previous hack (works on linux, not on osx; osx's ar does not support @file)
 #	echo $(ARFLAGS) $@ > $(AR_ARG_LIST_FILE)
 #	$(CAT) $(AR_OBJ_LIST_FILE) >> $(AR_ARG_LIST_FILE)
 #	$(AR) @$(AR_ARG_LIST_FILE)
-	$(RANLIB) $@
 else
-	$(AR) $(ARFLAGS) $@ $?
-	$(RANLIB) $@
+#	NOTE: Can't use $^ automatic variable as long as $(AR_OBJ_LIST_FILE) is in
+#	the list of prerequisites.
+	$(AR) $(ARFLAGS) $@ $^
 endif
+	$(RANLIB) $@
 	mkdir -p include_local
 	cp -f $(MK_HEADER_FILES) include_local
 else
@@ -394,42 +395,67 @@ else
 ifeq ($(FLA_ENABLE_MAX_ARG_LIST_HACK),yes)
 ### Kyungjoo 2015.10.21
 	@$(CAT) $(AR_OBJ_LIST_FILE) | xargs -n$(AR_CHUNK_SIZE) $(AR) $(ARFLAGS) $@
-### Previous hack (works on linux, not on osx)
+### Previous hack (works on linux, not on osx; osx's ar does not support @file)
 #	@echo $(ARFLAGS) $@ > $(AR_ARG_LIST_FILE)
 #	@$(CAT) $(AR_OBJ_LIST_FILE) >> $(AR_ARG_LIST_FILE)
 #	@$(AR) @$(AR_ARG_LIST_FILE)
-	@$(RANLIB) $@
 else
-	@$(AR) $(ARFLAGS) $@ $?
-	@$(RANLIB) $@
+#	NOTE: Can't use $^ automatic variable as long as $(AR_OBJ_LIST_FILE) is in
+#	the list of prerequisites.
+	@$(AR) $(ARFLAGS) $@ $^
 endif
+	@$(RANLIB) $@
 	@mkdir -p include_local
 	@cp -f $(MK_HEADER_FILES) include_local
 endif
 
 
-
 # --- Dynamic library linker rules for libflame ---
 $(MK_ALL_FLAMEC_DLL): $(MK_ALL_FLAMEC_OBJS)
 ifeq ($(FLA_ENABLE_VERBOSE_MAKE_OUTPUT),yes)
 ifeq ($(FLA_ENABLE_MAX_ARG_LIST_HACK),yes)
-	$(file > $@.in,$^)
-	$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ @$@.in
-	$(RM) $@.in
+	$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ @$(AR_OBJ_LIST_FILE)
 else
-	$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ $?
+#	NOTE: Can't use $^ automatic variable as long as $(AR_OBJ_LIST_FILE) is in
+#	the list of prerequisites.
+	$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ $^
 endif
 else
 	@echo "Dynamically linking $@"
 ifeq ($(FLA_ENABLE_MAX_ARG_LIST_HACK),yes)
-	@$(file > $@.in,$^)
-	@$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ @$@.in
-	@$(RM) $@.in
+	@$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ @$(AR_OBJ_LIST_FILE)
 else
-	@$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ $?
+#	NOTE: Can't use $^ automatic variable as long as $(AR_OBJ_LIST_FILE) is in
+#	the list of prerequisites.
+	@$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ $^
 endif
 endif
 
+# Original implementation of the rule above.
+# FGVZ: This rule has been observed to not work on at least one system, where
+# it appears the ".in" file is not fully written out, or written out at all,
+# prior to the shared library link command being executed.
+#$(MK_ALL_FLAMEC_DLL): $(MK_ALL_FLAMEC_OBJS)
+#ifeq ($(FLA_ENABLE_VERBOSE_MAKE_OUTPUT),yes)
+#ifeq ($(FLA_ENABLE_MAX_ARG_LIST_HACK),yes)
+#	$(file > $@.in,$^)
+#	$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ @$@.in
+#	$(RM) $@.in
+#else
+#	$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ $^
+#endif
+#else
+#	@echo "Dynamically linking $@"
+#ifeq ($(FLA_ENABLE_MAX_ARG_LIST_HACK),yes)
+#	@$(file > $@.in,$^)
+#	@$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ @$@.in
+#	@$(RM) $@.in
+#else
+#	@$(LINKER) -shared -Wl,-soname,libflame.so $(LDFLAGS) -o $@ $^
+#endif
+#endif
+
+
 
 
 # --- Test suite rules ---
@@ -533,11 +559,10 @@ endif
 
 # --- Clean rules ---
 cleanmost: check-config
-	- $(FIND) $(BASE_OBJ_DIR) -name "*.o" | $(XARGS) $(RM_F) 
-	- $(FIND) $(BASE_LIB_DIR) -name "*.a" | $(XARGS) $(RM_F) 
-	- $(FIND) $(BASE_LIB_DIR) -name "*.so" | $(XARGS) $(RM_F) 
+	- $(FIND) $(BASE_OBJ_DIR) -name "*.o" | $(XARGS) $(RM_F)
+	- $(FIND) $(BASE_LIB_DIR) -name "*.a" | $(XARGS) $(RM_F)
+	- $(FIND) $(BASE_LIB_DIR) -name "*.so" | $(XARGS) $(RM_F)
 	- $(RM_F) $(AR_OBJ_LIST_FILE)
-#	- $(RM_F) $(AR_ARG_LIST_FILE)
 	- $(RM_F) $(INCLUDE_LOCAL)/*.h
 
 distclean: check-config cleanmost cleanmk
@@ -551,7 +576,7 @@ distclean: check-config cleanmost cleanmk
 	- $(RM_RF) config.sys_type
 
 cleanmk: check-config
-	- $(FIND) $(SRC_DIR) -name "$(FRAGMENT_MK)" | $(XARGS) $(RM_F) 
+	- $(FIND) $(SRC_DIR) -name "$(FRAGMENT_MK)" | $(XARGS) $(RM_F)
 
 cleanleaves: check-config
 	- $(FIND) $(SRC_DIR) -name "*.[osx]" | $(XARGS) $(RM_F)
diff --git a/README b/README.md
similarity index 85%
rename from README
rename to README.md
index 3cd148a5c..395fdda0a 100644
--- a/README
+++ b/README.md
@@ -1,9 +1,4 @@
-
-libflame library
-README
----
-
-Thank you for deciding to try out the libflame library!
+# libflame library
 
 libflame is a portable library for dense matrix computations, providing
 much of the functionality present in LAPACK. In fact, libflame includes
@@ -30,18 +25,18 @@ source. You may also find a nightly build of the document here:
 You can keep in touch with developers and other users of the project by
 joining the following mailing list:
 
-  o libflame-discuss - http://groups.google.com/group/libflame-discuss
+ - libflame-discuss - http://groups.google.com/group/libflame-discuss
     Please join and post to this mailing list if you have general questions
     or feedback regarding libflame.
 
-  o (NOTE: We do not yet have a developer's mailing list. For now,
+ -  (NOTE: We do not yet have a developer's mailing list. For now,
     developers and those with developer-related questions can simply post
     to libflame-discuss.
 
 Also, please read the LICENSE file for information on copying and
 distributing this software.
 
-Thanks again for your interest in libflame!
+Thanks for your interest in libflame!
 
 Regards,
 
diff --git a/build/ac-macros/fla_check_with_extra_cflags.m4 b/build/ac-macros/fla_check_with_extra_cflags.m4
deleted file mode 100644
index eefa3a212..000000000
--- a/build/ac-macros/fla_check_with_extra_cflags.m4
+++ /dev/null
@@ -1,60 +0,0 @@
-AC_DEFUN([FLA_CHECK_WITH_EXTRA_CFLAGS],
-[
-	dnl Tell the user we're checking whether to enable the option.
-	AC_MSG_CHECKING([whether user requested using extra C compiler flags])
-	
-	dnl Determine whether the user gave the --enable-<option> or
-	dnl --disable-<option>. If so, then run the first snippet of code;
-	dnl otherwise, run the second code block.
-	AC_ARG_WITH([extra-cflags],
-	            AC_HELP_STRING([--with-extra-cflags=flagstring],[When compiling C code, use the flags in flagstring in addition to the flags that configure would normally use. This is useful when the user wants some extra flags passed to the compiler but does not want to manually set the CFLAGS environment variable and thus override all of the default compiler flags.]),
-	[
-		dnl If any form of the option is given, handle each case.
-		if test "$withval" = "no" ; then
-			
-			dnl User provided --with-<option>=no or --without-<option>.
-			fla_with_extra_cflags=no
-			fla_extra_cflags=''
-
-		else
-			
-			dnl User provided argument value: --with-<option>=value.
-			fla_with_extra_cflags=yes
-			fla_extra_cflags=$withval
-		fi
-	],
-	[
-		dnl User did not specify whether to enable or disable the option.
-		dnl Default behavior is to disable the option.
-		fla_with_extra_cflags=no
-		fla_extra_cflags=''
-	]
-	)
-	
-	dnl Now act according to whether a specific value was given.
-	if test "$fla_with_extra_cflags" = "no" ; then
-		
-		dnl Output the result.
-		AC_MSG_RESULT([no])
-		
-	else
-
-		dnl Output the result.
-		AC_MSG_RESULT([yes ($fla_extra_cflags)])
-		
-	fi
-	
-	dnl Check for CC environment variable, which would override everything else.
-	if test "$EXTRA_CFLAGS" != "" ; then
-		AC_MSG_NOTICE([[EXTRA_CFLAGS environment variable is set to $EXTRA_CFLAGS, which will override --with-extra-cflags option.]])
-        fla_with_extra_cflags=yes
-        fla_extra_cflags="$EXTRA_CFLAGS"
-	fi
-
-	dnl Declare EXTRA_CFLAGS as precious
-	AC_ARG_VAR([EXTRA_CFLAGS],[extra C compiler flags to be used in addition to those determined automatically by configure])
-	
-	dnl Substitute the output variable.
-	AC_SUBST(fla_with_extra_cflags)
-	AC_SUBST(fla_extra_cflags)
-])
diff --git a/build/ac-macros/fla_set_c_sse_flags.m4 b/build/ac-macros/fla_set_c_sse_flags.m4
index 765b1a503..33919a10b 100644
--- a/build/ac-macros/fla_set_c_sse_flags.m4
+++ b/build/ac-macros/fla_set_c_sse_flags.m4
@@ -15,6 +15,10 @@ AC_DEFUN([FLA_SET_C_SSE_FLAGS],
 		gcc)
 			fla_c_sse_flags='-msse3'
 		;;
+		dnl Clang.
+		clang)
+			fla_c_sse_flags='-msse3'
+		;;
 		dnl PathScale pathcc
 		pathcc)
 			fla_c_sse_flags='unknown'
diff --git a/build/config.mk.in b/build/config.mk.in
index a93b09d95..dbaa290c5 100644
--- a/build/config.mk.in
+++ b/build/config.mk.in
@@ -38,6 +38,11 @@ FLA_ENABLE_BUILTIN_BLAS        := @fla_enable_builtin_blas@
 FLA_ENABLE_LAPACK2FLAME        := @fla_enable_lapack2flame@
 FLA_MULTITHREADING_MODEL       := @fla_multithreading_model@
 
+# Alias the variable 'V' to the flag for verbosity.
+ifeq ($(V),1)
+FLA_ENABLE_VERBOSE_MAKE_OUTPUT := yes
+endif
+
 
 
 
@@ -90,26 +95,15 @@ endif
 
 # Aggregate all of the flags into two groups: one for optimizable code, and
 # one for code that should not be optimized.
-CFLAGS       := $(CDBGFLAGS) $(COPTFLAGS) $(CVECFLAGS) $(CWARNFLAGS) $(CMISCFLAGS) $(CPPROCFLAGS)
-CFLAGS_NOOPT := $(CDBGFLAGS) $(CWARNFLAGS) $(CMISCFLAGS) $(CPPROCFLAGS)
-
-# If the user requested that he supplement configure's CFLAGS with this own,
-# add them in.
-# *** Notice that we ALSO modify the 'no optimization' set of flags.
-#     THIS IS DANGEROUS. THE USER MUST TAKE CARE NOT TO ADD "EXTRA FLAGS"
-#     THAT WOULD DISRUPT THE NUMERICAL PROPERTIES OF SLAMCH/DLAMCH. ***
-ifeq (@fla_with_extra_cflags@,yes)
-CFLAGS       += @fla_extra_cflags@
-CFLAGS_NOOPT += @fla_extra_cflags@
-endif
+CFLAGS       := $(strip $(CDBGFLAGS) $(COPTFLAGS) $(CVECFLAGS) $(CWARNFLAGS) $(CMISCFLAGS) $(CPPROCFLAGS))
+CFLAGS_NOOPT := $(strip $(CDBGFLAGS) $(CWARNFLAGS) $(CMISCFLAGS) $(CPPROCFLAGS))
 
 # If the user provided his own CFLAGS, allow them to override our own.
-# *** Notice that we ALSO modify the 'no optimization' set of flags.
-#     THIS IS DANGEROUS. THE USER MUST TAKE CARE NOT TO ADD "EXTRA FLAGS"
-#     THAT WOULD DISRUPT THE NUMERICAL PROPERTIES OF SLAMCH/DLAMCH. ***
+# *** Notice that wo do not also modify the 'no optimization' set of flags.
+#     We do this to avoid potential numerical disruption of routines such
+#     as slamch/dlamch.
 ifneq (@fla_userdef_cflags@,)
-CFLAGS       := @CFLAGS@
-CFLAGS_NOOPT := @CFLAGS@
+CFLAGS       := @CFLAGS@ $(CFLAGS)
 endif
 
 
diff --git a/build/gen-make-frags.sh b/build/gen-make-frags.sh
index 092a141a4..c3e64fb3b 100755
--- a/build/gen-make-frags.sh
+++ b/build/gen-make-frags.sh
@@ -7,5 +7,5 @@
 #
 
 # Generate makefile fragments recursively, level 1 verbosity.
-./build/gen-make-frag.sh -rhv1 build/templates/fragment.mk src
+./build/gen-make-frag.sh -rhv0 build/templates/fragment.mk src
 
diff --git a/build/post-configure.sh.in b/build/post-configure.sh.in
index c246a54b8..8b5da1271 100755
--- a/build/post-configure.sh.in
+++ b/build/post-configure.sh.in
@@ -90,6 +90,9 @@ echo "   C compiler debug flags....................... : @fla_c_debug_flags@"
 echo "Enable compiler profiling symbols............... : @fla_enable_compiler_profiling@"
 echo "   C compiler profiling flags................... : @fla_c_prof_flags@"
 
+echo ""
+echo "User-specified CFLAGS (prepended)............... : @fla_userdef_cflags@"
+
 echo ""
 echo "Enable internal error checking.................. : @fla_enable_internal_error_checking@"
 if   [ "@fla_enable_internal_error_checking@" = "yes" ] ; then
@@ -142,12 +145,6 @@ echo "   Unmangled name............................... : @fla_f77_foobar_unmangl
 echo "   Mangled name................................. : @fla_f77_foobar_mangled@"
 fi
 
-echo ""
-echo "Compile with extra C compiler flags............. : @fla_with_extra_cflags@"
-if [ "@fla_with_extra_cflags@" = "yes" ] ; then
-echo "   User-requested extra C compiler flags........ : @fla_extra_cflags@"
-fi
-
 echo ""
 echo "libflame install directory prefix............... : @prefix@"
 echo ""
diff --git a/configure b/configure
index 038cce9bf..0ad5b079a 100755
--- a/configure
+++ b/configure
@@ -673,9 +673,6 @@ fla_enable_lapack2flame
 fla_enable_builtin_blas
 fla_enable_non_critical_code
 fla_c_lang_flags
-fla_extra_cflags
-fla_with_extra_cflags
-EXTRA_CFLAGS
 fla_enable_max_arg_list_hack
 fla_enable_dynamic_build
 fla_enable_static_build
@@ -769,7 +766,6 @@ enable_verbose_make_output
 enable_static_build
 enable_dynamic_build
 enable_max_arg_list_hack
-with_extra_cflags
 enable_non_critical_code
 enable_builtin_blas
 enable_lapack2flame
@@ -813,8 +809,7 @@ FIND
 XARGS
 F77
 FFLAGS
-CPP
-EXTRA_CFLAGS'
+CPP'
 
 
 # Initialize some variables set by options.
@@ -1642,13 +1637,6 @@ Optional Packages:
                           search list for the detected build architecture.
                           Note: the library archive indexer search list
                           usually consists only of "ranlib".
-  --with-extra-cflags=flagstring
-                          When compiling C code, use the flags in flagstring
-                          in addition to the flags that configure would
-                          normally use. This is useful when the user wants
-                          some extra flags passed to the compiler but does not
-                          want to manually set the CFLAGS environment variable
-                          and thus override all of the default compiler flags.
 
 Some influential environment variables:
   CC          C compiler command
@@ -1665,9 +1653,6 @@ Some influential environment variables:
   F77         Fortran 77 compiler command
   FFLAGS      Fortran 77 compiler flags
   CPP         C preprocessor
-  EXTRA_CFLAGS
-              extra C compiler flags to be used in addition to those
-              determined automatically by configure
 
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
@@ -6047,59 +6032,6 @@ $as_echo "no" >&6; }
 
 
 
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether user requested using extra C compiler flags" >&5
-$as_echo_n "checking whether user requested using extra C compiler flags... " >&6; }
-
-
-# Check whether --with-extra-cflags was given.
-if test "${with_extra_cflags+set}" = set; then :
-  withval=$with_extra_cflags;
-				if test "$withval" = "no" ; then
-
-						fla_with_extra_cflags=no
-			fla_extra_cflags=''
-
-		else
-
-						fla_with_extra_cflags=yes
-			fla_extra_cflags=$withval
-		fi
-
-else
-
-						fla_with_extra_cflags=no
-		fla_extra_cflags=''
-
-
-fi
-
-
-		if test "$fla_with_extra_cflags" = "no" ; then
-
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-
-	else
-
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes ($fla_extra_cflags)" >&5
-$as_echo "yes ($fla_extra_cflags)" >&6; }
-
-	fi
-
-		if test "$EXTRA_CFLAGS" != "" ; then
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: EXTRA_CFLAGS environment variable is set to $EXTRA_CFLAGS, which will override --with-extra-cflags option." >&5
-$as_echo "$as_me: EXTRA_CFLAGS environment variable is set to $EXTRA_CFLAGS, which will override --with-extra-cflags option." >&6;}
-        fla_with_extra_cflags=yes
-        fla_extra_cflags="$EXTRA_CFLAGS"
-	fi
-
-
-
-
-
-
-
-
 
 
 		case $CC in
@@ -6816,6 +6748,9 @@ $as_echo_n "checking for (guessing) SSE flags for $CC... " >&6; }
 		;;
 				gcc)
 			fla_c_sse_flags='-msse3'
+		;;
+				clang)
+			fla_c_sse_flags='-msse3'
 		;;
 				pathcc)
 			fla_c_sse_flags='unknown'
diff --git a/configure.ac b/configure.ac
index f1ef6bdbe..a9afcae78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -313,10 +313,6 @@ dnl Make sure the user requested at least one type of build (static and/or
 dnl dynamic).
 FLA_REQUIRE_STATIC_OR_DYNAMIC_BUILD
 
-dnl Check whether the user requested the ability to specify extra C compiler
-dnl flags.
-FLA_CHECK_WITH_EXTRA_CFLAGS
-
 dnl Set any generally recommended C preprocessor flags for the chosen compiler.
 FLA_SET_C_PREPROC_FLAGS
 
diff --git a/run-conf/run-configure.sh b/run-conf/run-configure.sh
index 76f1f2822..c53d65bfe 100755
--- a/run-conf/run-configure.sh
+++ b/run-conf/run-configure.sh
@@ -7,10 +7,9 @@ export FLAME_INSTALL_PREFIX=$HOME/flame
 export CC=gcc
 #export CC=icc
 
-# Add extra flags to the C compiler.
-# NOTE: DO NOT INSERT ANY FLAGS IN EXTRA_FLAGS THAT MIGHT DISRUPT NUMERICAL
-# PROPERTIES OF SLAMCH/DLAMCH.
-export EXTRA_CFLAGS="-march=native"
+# Any options specified in CFLAGS will be preprended to the flags that
+# libflame automatically determines.
+export CFLAGS="-march=native"
 
 # Run configure.
 ./configure --prefix=${FLAME_INSTALL_PREFIX} \