diff --git a/src/third_party/cspice/dfe.c b/src/third_party/cspice/dfe.c
index 6963d5a0..e7475273 100644
--- a/src/third_party/cspice/dfe.c
+++ b/src/third_party/cspice/dfe.c
@@ -2,7 +2,7 @@
 #include "fio.h"
 #include "fmt.h"
 
-y_rsk(Void)
+int y_rsk(Void)
 {
 	if(f__curunit->uend || f__curunit->url <= f__recpos
 		|| f__curunit->url == 1) return 0;
@@ -11,7 +11,7 @@ y_rsk(Void)
 	} while(++f__recpos < f__curunit->url);
 	return 0;
 }
-y_getc(Void)
+int y_getc(Void)
 {
 	int ch;
 	if(f__curunit->uend) return(-1);
@@ -61,9 +61,9 @@ y_newrec(Void)
 }
 
 #ifdef KR_headers
-c_dfe(a) cilist *a;
+int c_dfe(a) cilist *a;
 #else
-c_dfe(cilist *a)
+int c_dfe(cilist *a)
 #endif
 {
 	f__sequential=0;
diff --git a/src/third_party/cspice/due.c b/src/third_party/cspice/due.c
index 83f4dc00..c6526f16 100644
--- a/src/third_party/cspice/due.c
+++ b/src/third_party/cspice/due.c
@@ -2,9 +2,9 @@
 #include "fio.h"
 
 #ifdef KR_headers
-c_due(a) cilist *a;
+int c_due(a) cilist *a;
 #else
-c_due(cilist *a)
+int c_due(cilist *a)
 #endif
 {
 	if(!f__init) f_init();
diff --git a/src/third_party/cspice/fmt.c b/src/third_party/cspice/fmt.c
index 364210c2..9a1a52f6 100644
--- a/src/third_party/cspice/fmt.c
+++ b/src/third_party/cspice/fmt.c
@@ -44,7 +44,7 @@ char *ap_end(char *s)
 #ifdef KR_headers
 op_gen(a,b,c,d)
 #else
-op_gen(int a, int b, int c, int d)
+int op_gen(int a, int b, int c, int d)
 #endif
 {	struct syl *p= &f__syl[f__pc];
 	if(f__pc>=SYLMX)
@@ -111,7 +111,7 @@ char *f_s(char *s, int curloc)
 #ifdef KR_headers
 ne_d(s,p) char *s,**p;
 #else
-ne_d(char *s, char **p)
+int ne_d(char *s, char **p)
 #endif
 {	int n,x,sign=0;
 	struct syl *sp;
@@ -203,7 +203,7 @@ ne_d(char *s, char **p)
 #ifdef KR_headers
 e_d(s,p) char *s,**p;
 #else
-e_d(char *s, char **p)
+int e_d(char *s, char **p)
 #endif
 {	int i,im,n,w,d,e,found=0,x=0;
 	char *sv=s;
@@ -362,7 +362,7 @@ char *f_list(char *s)
 #ifdef KR_headers
 pars_f(s) char *s;
 #else
-pars_f(char *s)
+int pars_f(char *s)
 #endif
 {
 	f__parenlvl=f__revloc=f__pc=0;
@@ -380,7 +380,7 @@ flag f__workdone, f__nonl;
 #ifdef KR_headers
 type_f(n)
 #else
-type_f(int n)
+int type_f(int n)
 #endif
 {
 	switch(n)
@@ -504,7 +504,7 @@ loop:	switch(type_f((p= &f__syl[f__pc])->op))
 	}
 	return(0);
 }
-en_fio(Void)
+int en_fio(Void)
 {	ftnint one=1;
 	return(do_fio(&one,(char *)NULL,(ftnint)0));
 }
diff --git a/src/third_party/cspice/iio.c b/src/third_party/cspice/iio.c
index 58b2a75c..b92c6f19 100644
--- a/src/third_party/cspice/iio.c
+++ b/src/third_party/cspice/iio.c
@@ -6,7 +6,7 @@ char *f__icend;
 extern icilist *f__svic;
 int f__icnum;
 extern int f__hiwater;
-z_getc(Void)
+int z_getc(Void)
 {
 	if(f__recpos++ < f__svic->icirlen) {
 		if(f__icptr >= f__icend) err(f__svic->iciend,(EOF),"endfile");
@@ -25,7 +25,7 @@ z_putc(int c)
 	if (f__icptr < f__icend && f__recpos++ < f__svic->icirlen)
 		*f__icptr++ = c;
 }
-z_rnew(Void)
+int z_rnew(Void)
 {
 	f__icptr = f__svic->iciunit + (++f__icnum)*f__svic->icirlen;
 	f__recpos = 0;
@@ -42,9 +42,9 @@ z_endp(Void)
 	}
 
 #ifdef KR_headers
-c_si(a) icilist *a;
+int c_si(a) icilist *a;
 #else
-c_si(icilist *a)
+int c_si(icilist *a)
 #endif
 {
 	f__elist = (cilist *)a;
@@ -92,7 +92,7 @@ integer s_rsfi(icilist *a)
 	return(0);
 }
 
-z_wnew(Void)
+int z_wnew(Void)
 {
 	if (f__recpos < f__hiwater) {
 		f__icptr += f__hiwater - f__recpos;
diff --git a/src/third_party/cspice/lread.c b/src/third_party/cspice/lread.c
index 6f537a7e..9303ee0d 100644
--- a/src/third_party/cspice/lread.c
+++ b/src/third_party/cspice/lread.c
@@ -73,7 +73,7 @@ extern int ungetc(int, FILE*);	/* for systems with a buggy stdio.h */
 #endif
 #endif
 
-t_getc(Void)
+int t_getc(Void)
 {	int ch;
 	if(f__curunit->uend) return(EOF);
 	if((ch=getc(f__cf))!=EOF) return(ch);
@@ -523,9 +523,9 @@ l_CHAR(Void)
 	}
 }
 #ifdef KR_headers
-c_le(a) cilist *a;
+int c_le(a) cilist *a;
 #else
-c_le(cilist *a)
+int c_le(cilist *a)
 #endif
 {
 	if(!f__init)
@@ -543,9 +543,9 @@ c_le(cilist *a)
 	return(0);
 }
 #ifdef KR_headers
-l_read(number,ptr,len,type) ftnint *number,type; char *ptr; ftnlen len;
+int l_read(number,ptr,len,type) ftnint *number,type; char *ptr; ftnlen len;
 #else
-l_read(ftnint *number, char *ptr, ftnlen len, ftnint type)
+int l_read(ftnint *number, char *ptr, ftnlen len, ftnint type)
 #endif
 {
 #define Ptr ((flex *)ptr)
diff --git a/src/third_party/cspice/lwrite.c b/src/third_party/cspice/lwrite.c
index bf209f47..355dd16b 100644
--- a/src/third_party/cspice/lwrite.c
+++ b/src/third_party/cspice/lwrite.c
@@ -232,9 +232,9 @@ lwrt_C(double a, double b)
 	PUT(')');
 }
 #ifdef KR_headers
-l_write(number,ptr,len,type) ftnint *number,type; char *ptr; ftnlen len;
+int l_write(number,ptr,len,type) ftnint *number,type; char *ptr; ftnlen len;
 #else
-l_write(ftnint *number, char *ptr, ftnlen len, ftnint type)
+int l_write(ftnint *number, char *ptr, ftnlen len, ftnint type)
 #endif
 {
 #define Ptr ((flex *)ptr)
diff --git a/src/third_party/cspice/open.c b/src/third_party/cspice/open.c
index fcff7da0..5bcb6836 100644
--- a/src/third_party/cspice/open.c
+++ b/src/third_party/cspice/open.c
@@ -421,11 +421,11 @@ static void
 
 #ifdef KR_headers
 
-   fk_open( seq, fmt, n) ftnint n;
+   int fk_open( seq, fmt, n) ftnint n;
 
 #else
 
-   fk_open(int seq, int fmt, ftnint n)
+   int fk_open(int seq, int fmt, ftnint n)
 
 #endif
    {
diff --git a/src/third_party/cspice/rdfmt.c b/src/third_party/cspice/rdfmt.c
index 3de3e494..29a4b753 100644
--- a/src/third_party/cspice/rdfmt.c
+++ b/src/third_party/cspice/rdfmt.c
@@ -387,9 +387,9 @@ rd_POS(char *s)
 	return(1);
 }
 #ifdef KR_headers
-rd_ed(p,ptr,len) struct syl *p; char *ptr; ftnlen len;
+int rd_ed(p,ptr,len) struct syl *p; char *ptr; ftnlen len;
 #else
-rd_ed(struct syl *p, char *ptr, ftnlen len)
+int rd_ed(struct syl *p, char *ptr, ftnlen len)
 #endif
 {	int ch;
 	for(;f__cursor>0;f__cursor--) if((ch=(*f__getn)())<0) return(ch);
@@ -452,7 +452,7 @@ rd_ed(struct syl *p, char *ptr, ftnlen len)
 #ifdef KR_headers
 rd_ned(p) struct syl *p;
 #else
-rd_ned(struct syl *p)
+int rd_ned(struct syl *p)
 #endif
 {
 	switch(p->op)
diff --git a/src/third_party/cspice/rsfe.c b/src/third_party/cspice/rsfe.c
index f95d4e45..dac4034e 100644
--- a/src/third_party/cspice/rsfe.c
+++ b/src/third_party/cspice/rsfe.c
@@ -116,7 +116,7 @@ void    zzsetnnread_( logical * on );
 -&
 */
 
-xrd_SL(Void)
+int xrd_SL(Void)
    {
 
    int ch;
@@ -143,7 +143,7 @@ xrd_SL(Void)
    }
 
 
-x_getc(Void)
+int x_getc(Void)
    {
    
    int ch;
@@ -187,13 +187,13 @@ x_getc(Void)
    }
 
 
-x_endp(Void)
+int x_endp(Void)
    {
    xrd_SL();
    return f__curunit->uend == 1 ? EOF : 0;
    }
 
-x_rev(Void)
+int x_rev(Void)
    {
    (void) xrd_SL();
    return(0);
diff --git a/src/third_party/cspice/rsne.c b/src/third_party/cspice/rsne.c
index cc679c76..50c60e7b 100644
--- a/src/third_party/cspice/rsne.c
+++ b/src/third_party/cspice/rsne.c
@@ -36,7 +36,7 @@
 
  extern flag f__lquit;
  extern int f__lcount, nml_read;
- extern t_getc(Void);
+ extern int t_getc(Void);
 
 #ifdef KR_headers
  extern char *malloc(), *memset();
@@ -291,9 +291,9 @@ print_ne(cilist *a)
  static char where0[] = "namelist read start ";
 
 #ifdef KR_headers
-x_rsne(a) cilist *a;
+int x_rsne(a) cilist *a;
 #else
-x_rsne(cilist *a)
+int x_rsne(cilist *a)
 #endif
 {
 	int ch, got1, k, n, nd, quote, readall;
diff --git a/src/third_party/cspice/sfe.c b/src/third_party/cspice/sfe.c
index cade56a4..de6bf756 100644
--- a/src/third_party/cspice/sfe.c
+++ b/src/third_party/cspice/sfe.c
@@ -11,9 +11,9 @@ integer e_rsfe(Void)
 	return(n);
 }
 #ifdef KR_headers
-c_sfe(a) cilist *a; /* check */
+int c_sfe(a) cilist *a; /* check */
 #else
-c_sfe(cilist *a) /* check */
+int c_sfe(cilist *a) /* check */
 #endif
 {	unit *p;
 	f__curunit = p = &f__units[a->ciunit];
diff --git a/src/third_party/cspice/sue.c b/src/third_party/cspice/sue.c
index d2a7c34f..e19ba9c1 100644
--- a/src/third_party/cspice/sue.c
+++ b/src/third_party/cspice/sue.c
@@ -4,9 +4,9 @@ extern uiolen f__reclen;
 long f__recloc;
 
 #ifdef KR_headers
-c_sue(a) cilist *a;
+int c_sue(a) cilist *a;
 #else
-c_sue(cilist *a)
+int c_sue(cilist *a)
 #endif
 {
 	f__external=f__sequential=1;
diff --git a/src/third_party/cspice/uio.c b/src/third_party/cspice/uio.c
index e40875e0..7240240e 100644
--- a/src/third_party/cspice/uio.c
+++ b/src/third_party/cspice/uio.c
@@ -3,9 +3,9 @@
 uiolen f__reclen;
 
 #ifdef KR_headers
-do_us(number,ptr,len) ftnint *number; char *ptr; ftnlen len;
+int do_us(number,ptr,len) ftnint *number; char *ptr; ftnlen len;
 #else
-do_us(ftnint *number, char *ptr, ftnlen len)
+int do_us(ftnint *number, char *ptr, ftnlen len)
 #endif
 {
 	if(f__reading)
diff --git a/src/third_party/cspice/wref.c b/src/third_party/cspice/wref.c
index 2f3fce89..0f31e3f4 100644
--- a/src/third_party/cspice/wref.c
+++ b/src/third_party/cspice/wref.c
@@ -16,9 +16,9 @@
 #endif
 
 #ifdef KR_headers
-wrt_E(p,w,d,e,len) ufloat *p; ftnlen len;
+int wrt_E(p,w,d,e,len) ufloat *p; ftnlen len;
 #else
-wrt_E(ufloat *p, int w, int d, int e, ftnlen len)
+int wrt_E(ufloat *p, int w, int d, int e, ftnlen len)
 #endif
 {
 	char buf[FMAX+EXPMAXDIGS+4], *s, *se;
@@ -192,9 +192,9 @@ wrt_E(ufloat *p, int w, int d, int e, ftnlen len)
 	}
 
 #ifdef KR_headers
-wrt_F(p,w,d,len) ufloat *p; ftnlen len;
+int wrt_F(p,w,d,len) ufloat *p; ftnlen len;
 #else
-wrt_F(ufloat *p, int w, int d, ftnlen len)
+int wrt_F(ufloat *p, int w, int d, ftnlen len)
 #endif
 {
 	int d1, sign, n;
diff --git a/src/third_party/cspice/wrtfmt.c b/src/third_party/cspice/wrtfmt.c
index 477c40f5..004200f8 100644
--- a/src/third_party/cspice/wrtfmt.c
+++ b/src/third_party/cspice/wrtfmt.c
@@ -220,7 +220,7 @@ wrt_H(int a, char *s)
 #ifdef KR_headers
 wrt_L(n,len, sz) Uint *n; ftnlen sz;
 #else
-wrt_L(Uint *n, int len, ftnlen sz)
+int wrt_L(Uint *n, int len, ftnlen sz)
 #endif
 {	int i;
 	long x;
@@ -290,9 +290,9 @@ wrt_G(ufloat *p, int w, int d, int e, ftnlen len)
 	return(wrt_E(p,w,d,e,len));
 }
 #ifdef KR_headers
-w_ed(p,ptr,len) struct syl *p; char *ptr; ftnlen len;
+int w_ed(p,ptr,len) struct syl *p; char *ptr; ftnlen len;
 #else
-w_ed(struct syl *p, char *ptr, ftnlen len)
+int w_ed(struct syl *p, char *ptr, ftnlen len)
 #endif
 {
 	int i;
@@ -336,9 +336,9 @@ w_ed(struct syl *p, char *ptr, ftnlen len)
 	}
 }
 #ifdef KR_headers
-w_ned(p) struct syl *p;
+int w_ned(p) struct syl *p;
 #else
-w_ned(struct syl *p)
+int w_ned(struct syl *p)
 #endif
 {
 	switch(p->op)