fix SIMD detection script

macros/Makefile.am

@@ -18,27 +18,4 @@
 # ========LICENCE========
 #
 
-
-EXTRA_DIST=\
-	   aclocal-include.m4      \
-	   ax_cxx_compile_stdcxx_11.m4 \
-	   config-header.m4        \
-	   debug.m4                \
-	   expat-check.m4          \
-	   fflas-ffpack-check.m4   \
-	   iml-check.m4            \
-	   lidia-check.m4          \
-	   linbox-benchmark.m4     \
-	   linbox-doc.m4           \
-	   linbox-misc.m4          \
-	   linbox-opt.m4           \
-	   maple-check-version.mpl \
-	   maple-check.m4          \
-	   ntl-check.m4            \
-	   saclib-check.m4         \
-	   mpfr-check.m4           \
-	   fplll-check.m4          \
-	   m4rie-check.m4          \
-	   m4ri-check.m4           \
-	   tinyxml2-check.m4        \
-	   sage-check.m4
+SUBDIRS=CodeChunk

macros/instr_set.m4

@@ -23,7 +23,9 @@ AC_DEFUN([INSTR_SET],
         AC_ARG_ENABLE(fma,[AC_HELP_STRING([--disable-fma], [ disable FMA instruction set (enabled by default when available)])],[],[])
         AC_ARG_ENABLE(fma4,[AC_HELP_STRING([--disable-fma4], [ disable FMA4 instruction set (enabled by default when available)])],[],[])
 
-        AC_TRY_RUN([
+      BACKUP_CPPFLAGS=${CPPFLAGS}
+      CPPFLAGS=-I${srcdir}
+      AC_TRY_RUN([
                         #include "macros/CodeChunk/instrset_detect.cpp"
                         // increment by one to distinguish from compilation failure error code
                         int main(){return instrset_detect()+1;}
@@ -81,4 +83,6 @@ AC_DEFUN([INSTR_SET],
                                 SIMD_CFLAGS="${SIMD_CFLAGS} -mfma4"
                               ],[AS_ECHO("FMA4 disabled")])
                 ],[AS_ECHO("FMA4 disabled")])
+       CPPFLAGS=${BACKUP_CPPFLAGS}
+
 ])