--- src/basemath/buch2.c.orig	2022-09-16 11:16:27.000000000 -0600
+++ src/basemath/buch2.c	2022-09-19 16:25:24.530260133 -0600
@@ -1140,7 +1140,7 @@ getfu(GEN nf, GEN *ptA, GEN *ptU, long p
 }
 
 static void
-err_units() { pari_err_PREC("makeunits [cannot get units, use bnfinit(,1)]"); }
+err_units(void) { pari_err_PREC("makeunits [cannot get units, use bnfinit(,1)]"); }
 
 /* bound for log2 |sigma(u)|, sigma complex embedding, u fundamental unit
  * attached to bnf_get_logfu */
--- src/basemath/mftrace.c.orig	2022-09-16 11:16:27.000000000 -0600
+++ src/basemath/mftrace.c	2022-09-19 16:25:24.532260138 -0600
@@ -631,7 +631,7 @@ mfcharGL(GEN G, GEN L)
   return mkvec4(G, L, o, polcyclo(ord,vt));
 }
 static GEN
-mfchartrivial()
+mfchartrivial(void)
 { return mfcharGL(znstar0(gen_1,1), cgetg(1,t_COL)); }
 /* convert a generic character into an 'mfchar' */
 static GEN
@@ -1725,7 +1725,7 @@ mfcoef(GEN F, long n)
 }
 
 static GEN
-paramconst() { return tagparams(t_MF_CONST, mkNK(1,0,mfchartrivial())); }
+paramconst(void) { return tagparams(t_MF_CONST, mkNK(1,0,mfchartrivial())); }
 static GEN
 mftrivial(void) { retmkvec2(paramconst(), cgetg(1,t_VEC)); }
 static GEN
--- src/basemath/modsym.c.orig	2022-09-16 11:16:27.000000000 -0600
+++ src/basemath/modsym.c	2022-09-19 16:25:24.533260140 -0600
@@ -1406,11 +1406,11 @@ indices_backward(GEN W, GEN C)
 
 /*[0,-1;1,-1]*/
 static GEN
-mkTAU()
+mkTAU(void)
 { return mkmat22(gen_0,gen_m1, gen_1,gen_m1); }
 /* S */
 static GEN
-mkS()
+mkS(void)
 { return mkmat22(gen_0,gen_1, gen_m1,gen_0); }
 /* N = integer > 1. Returns data describing Delta_0 = Z[P^1(Q)]_0 seen as
  * a Gamma_0(N) - module. */
--- src/language/init.c.orig	2022-09-16 11:16:27.000000000 -0600
+++ src/language/init.c	2022-09-19 16:25:24.534260143 -0600
@@ -122,7 +122,7 @@ void (*cb_pari_pre_recover)(long);
 void (*cb_pari_err_recover)(long);
 int (*cb_pari_break_loop)(int);
 int (*cb_pari_is_interactive)(void);
-void (*cb_pari_start_output)();
+void (*cb_pari_start_output)(void);
 
 const char * pari_library_path = NULL;
 
--- src/modules/mpqs.c.orig	2022-09-16 11:16:27.000000000 -0600
+++ src/modules/mpqs.c	2022-09-19 16:25:24.534260143 -0600
@@ -1501,7 +1501,7 @@ mpqs_solve_linear_system(mpqs_handle_t *
 /**               MAIN ENTRY POINT AND DRIVER ROUTINE               **/
 /*********************************************************************/
 static void
-toolarge()
+toolarge(void)
 { pari_warn(warner, "MPQS: number too big to be factored with MPQS,\n\tgiving up"); }
 
 /* Factors N using the self-initializing multipolynomial quadratic sieve