irrlamb vs ctype.h

I could use a set of eyes on this for the case that I'm missing something.

Newer libcxx pulls in ctype.h which defines _L and _C to flag values, that
doesn't work well with the existing code. This results in this kind of error:

c++: warning: argument unused during compilation: '-s' [-Wunused-command-line-argument]
/tmp/pobj/irrlamb-1.0.1/irrlamb-1.0.1r613/src/ode/src/lcp.cpp:382:33: error: expected ')'
dReal *_pairslh, dReal *_L, dReal *_d,
^
/usr/include/ctype.h:46:12: note: expanded from macro '_L'
#define _L 0x02
^

Index: Makefile
===================================================================
RCS file: /cvs/ports/games/irrlamb/Makefile,v
diff -u -p -r1.19 Makefile
--- Makefile 26 Sep 2023 09:41:37 -0000 1.19
+++ Makefile 28 Dec 2023 17:50:24 -0000
@@ -3,6 +3,7 @@ COMMENT = third person, 3D physics game
DISTNAME = irrlamb-$Vr613-src
PKGNAME = irrlamb-$V
CATEGORIES = games x11
+REVISION = 0

# GPLv3+
PERMIT_PACKAGE = Yes
@@ -36,6 +37,8 @@ SSE_FLAGS = -msse -mfpmath=sse
SSE_FLAGS =
.endif
SUBST_VARS += SSE_FLAGS
+
+FIX_CRLF_FILES += ./src/ode/src/lcp.cpp

post-extract:
rm -rf ${WRKSRC}/src/irrlicht
Index: patches/patch-src_ode_src_lcp_cpp
===================================================================
RCS file: patches/patch-src_ode_src_lcp_cpp
diff -N patches/patch-src_ode_src_lcp_cpp
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ patches/patch-src_ode_src_lcp_cpp 28 Dec 2023 13:48:57 -0000
@@ -0,0 +1,58 @@
+Avoid conflict with ctype.h's _C and _L macros
+
+Index: src/ode/src/lcp.cpp
+--- src/ode/src/lcp.cpp.orig
++++ src/ode/src/lcp.cpp
+@@ -274,7 +274,7 @@ void swapProblem (ATYPE A, dReal pairsbx[PBX__MAX], dR
+ #ifdef DEBUG_LCP
+
+ static
+-void checkFactorization (ATYPE A, dReal *_L, dReal *_d,
++void checkFactorization (ATYPE A, dReal *_l, dReal *_d,
+ unsigned nC, unsigned *C, unsigned nskip)
+ {
+ unsigned i, j;
+@@ -291,7 +291,7 @@ void checkFactorization (ATYPE A, dReal *_L, dReal *_d
+ // printf ("A2=\n"); A2.print(); printf ("\n");
+
+ // compute A3 = L*D*L'
+- dMatrix L (nC, nC, _L, nskip, 1);
++ dMatrix L (nC, nC, _l, nskip, 1);
+ dMatrix D (nC, nC);
+ for (i = 0; i < nC; i++) D(i, i) = 1.0 / _d[i];
+ L.clearUpperTriangle();
+@@ -379,9 +379,9 @@ struct dLCP {
+ unsigned *const m_p, *const m_C;
+
+ dLCP (unsigned _n, unsigned _nskip, unsigned _nub, dReal *_Adata, dReal *_pairsbx, dReal *_w,
+- dReal *_pairslh, dReal *_L, dReal *_d,
++ dReal *_pairslh, dReal *_l, dReal *_d,
+ dReal *_Dell, dReal *_ell, dReal *_tmp,
+- bool *_state, int *_findex, unsigned *_p, unsigned *_C, dReal **Arows);
++ bool *_state, int *_findex, unsigned *_p, unsigned *_c, dReal **Arows);
+ unsigned getNub() const { return m_nub; }
+ void transfer_i_to_C (unsigned i);
+ void transfer_i_to_N (unsigned /*i*/) { m_nN++; } // because we can assume C and N span 1:i-1
+@@ -409,9 +409,9 @@ struct dLCP {
+
+
+ dLCP::dLCP (unsigned _n, unsigned _nskip, unsigned _nub, dReal *_Adata, dReal *_pairsbx, dReal *_w,
+- dReal *_pairslh, dReal *_L, dReal *_d,
++ dReal *_pairslh, dReal *_l, dReal *_d,
+ dReal *_Dell, dReal *_ell, dReal *_tmp,
+- bool *_state, int *_findex, unsigned *_p, unsigned *_C, dReal **Arows):
++ bool *_state, int *_findex, unsigned *_p, unsigned *_c, dReal **Arows):
+ m_n(_n), m_nskip(_nskip), m_nub(_nub), m_nC(0), m_nN(0),
+ # ifdef ROWPTRS
+ m_A(Arows),
+@@ -419,8 +419,8 @@ dLCP::dLCP (unsigned _n, unsigned _nskip, unsigned _nu
+ m_A(_Adata),
+