- depend on NTL: this is mandatory for SageMath, but if some users want

  a lighter package, I set it as an option.

- upgrade to the latest 4.1.3: it builds with 4.1.2 but 4.1.3 is said as
  fixing some errors seen in SageMath.

- since I was here, remove the OPTFLAGS.

PR:		245897
Submitted by:	/me
Approved by:	yuri (maintainer)

1 files changed, 11 insertions, 0 deletions

diff --git a/math/singular/files/patch-m4_flags.m4 b/math/singular/files/patch-m4_flags.m4
new file mode 100644
index 000000000000..d6e21e0bceab
--- /dev/null
+++ b/math/singular/files/patch-m4_flags.m4
@@ -0,0 +1,11 @@
+--- m4/flags.m4.orig	2020-01-24 09:42:54 UTC
++++ m4/flags.m4
+@@ -122,7 +122,7 @@ AC_DEFUN([SING_CHECK_SET_ARGS], [
+  ## for clang: -Wunneeded-internal-declaration
+ 
+  if test "x${ENABLE_OPTIMIZATION}" != xno; then
+-  OPTFLAGS="-g0 -O3 -Wno-unused-function -Wno-trigraphs -Wno-unused-parameter -Wunknown-pragmas -Wno-unused-variable -fomit-frame-pointer -fwrapv -fvisibility=default -finline-functions -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -fconserve-space -funroll-loops -fno-delete-null-pointer-checks"
++  OPTFLAGS="-Wno-unused-function -Wno-trigraphs -Wno-unused-parameter -Wunknown-pragmas -Wno-unused-variable -fomit-frame-pointer -fwrapv -fvisibility=default -finline-functions -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -fconserve-space -funroll-loops -fno-delete-null-pointer-checks"
+   #  -O3 - crashes gcc???!!!
+   # -fpermissive
+   AC_LANG_PUSH([C])