diff -u -p --recursive -N a/sextractor-2.19.5/acx_mkl_gcc.m4 b/sextractor-2.19.5/acx_mkl_gcc.m4
--- a/sextractor-2.19.5/acx_mkl_gcc.m4	1969-12-31 19:00:00.000000000 -0500
+++ b/sextractor-2.19.5/acx_mkl_gcc.m4	2017-12-30 17:54:54.000000000 -0500
@@ -0,0 +1,210 @@
+dnl
+dnl				acx_mkl_gcc.m4
+dnl
+dnl Set up options for using the INTEL MKL library.
+dnl
+dnl %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+dnl
+dnl	This file part of:	AstrOmatic software
+dnl
+dnl	Copyright:		(C) 2003-2013 Emmanuel Bertin -- IAP/CNRS/UPMC
+dnl
+dnl	License:		GNU General Public License
+dnl
+dnl	AstrOmatic software is free software: you can redistribute it and/or
+dnl	modify it under the terms of the GNU General Public License as
+dnl	published by the Free Software Foundation, either version 3 of the
+dnl	License, or (at your option) any later version.
+dnl	AstrOmatic software is distributed in the hope that it will be useful,
+dnl	but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl	GNU General Public License for more details.
+dnl	You should have received a copy of the GNU General Public License
+dnl	along with AstrOmatic software.
+dnl	If not, see <http://www.gnu.org/licenses/>.
+dnl
+dnl	Last modified:		17/04/2013
+dnl
+dnl %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+dnl
+dnl @synopsis ACX_MKL_GCC([MKL_DIR, ILP64_FLAG, STATIC_FLAG, CONV_LIBS])
+dnl
+dnl This macro sets the MKL_CFLAGS, MKL_LDFLAGS and MKL_LIBS variables to
+dnl for compiling and linking with INTEL's MKL. A coma-separated list of
+dnl convenience libraries may be included in the linked group for static linking.
+dnl You may wish to use these variables in your default CFLAGS:
+dnl
+dnl        CFLAGS="$CFLAGS $MKL_CFLAGS"
+dnl
+dnl You may wish to use these variables in your default LDFLAGS:
+dnl
+dnl        LDFLAGS="$LDFLAGS $MKL_LDLAGS"
+dnl
+dnl You may wish to use these variables in your default LIBS:
+dnl
+dnl        LIBS="$LIBS $MKL_LIBS"
+dnl
+
+AC_DEFUN([ACX_MKL_GCC], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+
+dnl ------------------------
+dnl Set MKL's root directory
+dnl ------------------------
+
+if test x$1 = x; then
+  mklroot=${MKLROOT}
+else
+  mklroot=$1
+fi
+
+dnl -----------------------------
+dnl Include convenience libraries
+dnl -----------------------------
+
+if test x$4 = x; then
+  startgroup="-Wl,--start-group"
+else
+  startgroup="-Wl,--start-group,$4"
+fi
+
+dnl ----------------------
+dnl Set architecture flags
+dnl ----------------------
+
+dnl check if GCC (or clang... it doesn't matter here) compiler is present
+gcc --version 2>&1 | egrep -i "gcc|clang" > /dev/null 2>&1 && flaggcc=yes
+
+# Meh.
+flag64=yes
+
+dnl check if the platform is OSX
+sw_vers 2>&1 | grep -i "ProductVersion" > /dev/null 2>&1 && flagosx=yes
+
+dnl ----------------------
+dnl Exit if INTEL compiler is not found
+dnl ----------------------
+if test x$flaggcc = x; then
+  AC_SUBST(MKL_CFLAGS, "")
+  AC_SUBST(MKL_LDFLAGS, "")
+  AC_SUBST(MKL_LIBS, "")
+  MKL_WARN="GCC compiler not detected"
+  AC_SUBST(MKL_WARN)
+  exit
+fi
+
+if test x$flagosx = xyes; then
+dnl MacOSX
+  if test x$flag64 = xyes; then
+dnl INTEL compiler uses Intel64 architecture
+    if test x$2 = xyes; then
+dnl 64 bit pointers
+      AC_SUBST(MKL_CFLAGS, "-fopenmp -DMKL_ILP64 -I$mklroot/include")
+      if test x$3 = xyes; then
+dnl Static linking
+        AC_SUBST(MKL_LIBS, ["$mklroot/lib/libmkl_intel_ilp64.a \
+		$mklroot/lib/libmkl_intel_thread.a \
+		$mklroot/lib/libmkl_core.a -lpthread -lm"])
+      else
+dnl Dynamic linking
+        AC_SUBST(MKL_LIBS, "-L$mklroot/lib  -lmkl_intel_ilp64 \
+	-lmkl_intel_thread -lmkl_core -lpthread -lm")
+      fi
+    else
+dnl 32 bit pointers
+      AC_SUBST(MKL_CFLAGS, "-fopenmp -I$mklroot/include")
+      if test x$3 = xyes; then
+dnl Static linking
+        AC_SUBST(MKL_LIBS, ["$mklroot/lib/libmkl_intel_lp64.a \
+		$mklroot/lib/libmkl_intel_thread.a \
+		$mklroot/lib/libmkl_core.a -lpthread -lm"])
+      else
+dnl Dynamic linking
+        AC_SUBST(MKL_LIBS, "-L$mklroot/lib -lmkl_intel_lp64 \
+		-lmkl_intel_thread -lmkl_core -lpthread -lm")
+      fi
+    fi
+  else
+dnl INTEL compiler uses IA32 architecture
+    AC_SUBST(MKL_CFLAGS, "-fopenmp -I$mklroot/include")
+    if test x$3 = xyes; then
+dnl Static linking
+    AC_SUBST(MKL_LIBS, ["$mklroot/lib/libmkl_intel.a \
+	$mklroot/lib/libmkl_intel_thread.a \
+	$mklroot/lib/libmkl_core.a -lpthread -lm"])
+    else
+dnl Dynamic linking
+      AC_SUBST(MKL_LIBS, "-L$mklroot/lib -lmkl_intel -lmkl_intel_thread \
+	-lmkl_core -lpthread -lm")
+    fi
+  fi
+else
+dnl Linux
+  if test x$flag64 = xyes; then
+dnl INTEL compiler uses Intel64 architecture
+    if test x$2 = xyes; then
+dnl 64 bit pointers
+      AC_SUBST(MKL_CFLAGS, "-fopenmp -DMKL_ILP64 -I$mklroot/include")
+      if test x$3 = xyes; then
+dnl Static linking
+      AC_SUBST(MKL_LIBS,
+	["$startgroup,$mklroot/lib/intel64/libmkl_intel_ilp64.a,\
+$mklroot/lib/intel64/libmkl_intel_thread.a,\
+$mklroot/lib/intel64/libmkl_core.a,-end-group -lpthread -lm"])
+      else
+dnl Dynamic linking
+        AC_SUBST(MKL_LIBS, "-L$mklroot/lib/intel64  -lmkl_intel_ilp64 \
+		-lmkl_intel_thread -lmkl_core -lpthread -lm")
+      fi
+    else
+dnl 32 bit pointers
+      AC_SUBST(MKL_CFLAGS, "-fopenmp -I$mklroot/include")
+      if test x$3 = xyes; then
+dnl Static linking
+        AC_SUBST(MKL_LIBS,
+		["$startgroup,$mklroot/lib/intel64/libmkl_intel_lp64.a,\
+$mklroot/lib/intel64/libmkl_intel_thread.a,\
+$mklroot/lib/intel64/libmkl_core.a,--end-group -lpthread -lm"])
+      else
+dnl Dynamic linking
+        AC_SUBST(MKL_LIBS, "-L$mklroot/lib/intel64 -lmkl_intel_lp64 \
+	-lmkl_intel_thread -lmkl_core -lpthread -lm")
+      fi
+    fi
+  else
+dnl INTEL compiler uses IA32 architecture
+    AC_SUBST(MKL_CFLAGS, "-fopenmp -I$mklroot/include")
+    if test x$3 = xyes; then
+dnl Static linking
+      AC_SUBST(MKL_LIBS, ["$startgroup,$mklroot/lib/ia32/libmkl_intel.a,\
+$mklroot/lib/ia32/libmkl_intel_thread.a,\
+$mklroot/lib/ia32/libmkl_core.a,--end-group -lpthread -lm"])
+    else
+dnl Dynamic linking
+      AC_SUBST(MKL_LIBS, "-L$mklroot/lib/ia32 -lmkl_intel -lmkl_intel_thread \
+	-lmkl_core -lpthread -lm")
+    fi
+  fi
+fi
+
+AC_SUBST(MKL_LDFLAGS, "")
+
+dnl --------------------
+dnl Set internal flags
+dnl --------------------
+
+AC_DEFINE(HAVE_MKL,1, [Define if you have the MKL libraries.])
+AC_DEFINE(HAVE_FFTW,1, [Define if you have the FFTW libraries.])
+AC_DEFINE(HAVE_LAPACK,1, [Define if you have the LAPACK libraries.])
+AC_DEFINE(HAVE_LAPACKE,1, [Define if you have the LAPACKe libraries.])
+
+dnl --------------------
+dnl Set include files
+dnl --------------------
+
+AC_DEFINE_UNQUOTED(MKL_H, "mkl.h", [MKL header filename.])
+AC_DEFINE_UNQUOTED(FFTW_H, "fftw/fftw3_mkl.h", [FFTW header filename.])
+AC_DEFINE_UNQUOTED(LAPACK_H, "mkl_lapack.h", [LAPACK header filename.])
+AC_DEFINE_UNQUOTED(LAPACKE_H, "mkl_lapacke.h", [LAPACKe header filename.])
+
+])dnl ACX_MKL_GCC
diff -u -p --recursive -N a/sextractor-2.19.5/configure.ac b/sextractor-2.19.5/configure.ac
--- a/sextractor-2.19.5/configure.ac	2013-12-14 12:12:32.000000000 -0500
+++ b/sextractor-2.19.5/configure.ac	2017-12-30 16:37:44.000000000 -0500
@@ -48,6 +48,7 @@ AC_SUBST(DATE3, "$date3")
 sinclude(acx_atlas.m4)
 sinclude(acx_fftw.m4)
 sinclude(acx_mkl.m4)
+sinclude(acx_mkl_gcc.m4)
 sinclude(acx_prog_cc_optim.m4)
 sinclude(acx_pthread.m4)
 sinclude(acx_urbi_resolve_dir.m4)
@@ -79,12 +80,21 @@ AC_ARG_ENABLE(icc,
 AC_MSG_CHECKING([whether we should use INTEL's MKL])
 AC_ARG_ENABLE(mkl,
 	[AS_HELP_STRING([--enable-mkl],
-	[Use INTEL's MKL for solvers and FFTs (off by default)])],
+	[Use INTEL MKL for solvers and FFTs (off by default)])],
         enable_icc="yes"
         CC="icc"
 	AC_MSG_RESULT([yes]),
 	AC_MSG_RESULT([no]))
 
+AC_MSG_CHECKING([whether we should use INTEL MKL with gcc])
+AC_ARG_ENABLE(mkl_gcc,
+	[AS_HELP_STRING([--enable-mkl-gcc],
+	[Use INTEL MKL for solvers and FFTs (off by default)])],
+        enable_mkl_gcc="yes"
+        CC="gcc"
+	AC_MSG_RESULT([yes]),
+	AC_MSG_RESULT([no]))
+
 # Checks for programs.
 AC_LANG(C)
 
@@ -105,7 +115,7 @@ AC_HEADER_STDC
 AC_CHECK_HEADERS([fcntl.h limits.h malloc.h stdlib.h string.h sys/mman.h \
 		sys/types.h unistd.h])
 # Checks for INTEL math header files.
-if test x$enable_icc = xyes; then
+if test x$enable_icc = xyes || test x$enable_mkl_gcc = xyes; then
   AC_CHECK_HEADERS(mathimf.h)
 fi
 
@@ -226,9 +236,14 @@ AM_CONDITIONAL(USE_THREADS, [test x$use_
 if test x$enable_model_fitting != xno; then
   AC_DEFINE(USE_MODEL, 1, [Triggers model-fitting])
 ############ handle the INTEL MKL library (FFTW + LAPACK) ###########
-  if test x$enable_mkl = xyes; then
+  if test x$enable_mkl = xyes || test x$enable_mkl_gcc = xyes; then
     convlibs="${srcdir}/wcs/libwcs_c.a,${srcdir}/levmar/liblevmar.a"
-    ACX_MKL($with_mkl_dir,,$enable_best_link,$convlibs)
+    if test x$enable_mkl_gcc = xyes; then
+        ACX_MKL_GCC($with_mkl_dir,,$enable_best_link,$convlibs)
+    else
+        ACX_MKL($with_mkl_dir,,$enable_best_link,$convlibs)
+    fi
+
     if test x$MKL_WARN != x; then
       AC_MSG_WARN([$MKL_WARN])
     fi
@@ -256,7 +271,7 @@ AM_CONDITIONAL(USE_MODEL, [test x$enable
 
 # Compile with profiling option
 if test x$enable_profiling = xyes; then
-  if test x$enable_icc = xyes; then
+  if test x$enable_icc = xyes || test x$enable_mkl_gcc = xyes; then
     AM_CFLAGS="$AM_CFLAGS -pq"
   else
     AM_CFLAGS="$AM_CFLAGS -pg"