Avoid implicit declarations in long double complex functions

Hi y'all, I came across some compilation errors that the following patch
fixed. Most long double complex math functions use long double real
functions that are only defined #ifdef _LDBL_EQ_DBL, so I extended that to
the functions that use them.
---
From b7e340cf8583491463c9a29df936bd11d747029a Mon Sep 17 00:00:00 2001
From: Dionna Glaze <[email protected]>
Date: Wed, 12 Jun 2019 17:06:22 -0700
Subject: [PATCH 1/1] Define long double complex functions only if their
 dependencies exist

Signed-off-by: Dionna Glaze <[email protected]>
---
 newlib/libm/complex/cacoshl.c      | 2 ++
 newlib/libm/complex/cacosl.c       | 2 ++
 newlib/libm/complex/casinhl.c      | 2 ++
 newlib/libm/complex/casinl.c       | 2 ++
 newlib/libm/complex/catanhl.c      | 2 ++
 newlib/libm/complex/catanl.c       | 2 ++
 newlib/libm/complex/ccoshl.c       | 2 ++
 newlib/libm/complex/ccosl.c        | 2 ++
 newlib/libm/complex/cephes_subrl.c | 2 ++
 newlib/libm/complex/cexpl.c        | 2 ++
 newlib/libm/complex/clogl.c        | 2 ++
 newlib/libm/complex/cpowl.c        | 2 ++
 newlib/libm/complex/cprojl.c       | 2 ++
 newlib/libm/complex/csinhl.c       | 2 ++
 newlib/libm/complex/csinl.c        | 2 ++
 newlib/libm/complex/csqrtl.c       | 2 ++
 newlib/libm/complex/ctanhl.c       | 2 ++
 newlib/libm/complex/ctanl.c        | 2 ++
 18 files changed, 36 insertions(+)

diff --git a/newlib/libm/complex/cacoshl.c b/newlib/libm/complex/cacoshl.c
index 4e4e006b9..bd0282504 100644
--- a/newlib/libm/complex/cacoshl.c
+++ b/newlib/libm/complex/cacoshl.c
@@ -31,6 +31,7 @@

 #include <complex.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 cacoshl(long double complex z)
 {
@@ -43,3 +44,4 @@ cacoshl(long double complex z)
 #endif
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/cacosl.c b/newlib/libm/complex/cacosl.c
index 6a05c8cb7..c66c22f66 100644
--- a/newlib/libm/complex/cacosl.c
+++ b/newlib/libm/complex/cacosl.c
@@ -33,6 +33,7 @@
 #include <math.h>
 #include "cephes_subrl.h"

+#ifdef _LDBL_EQ_DBL
 long double complex
 cacosl(long double complex z)
 {
@@ -43,3 +44,4 @@ cacosl(long double complex z)
  return w;
 }

+#endif
diff --git a/newlib/libm/complex/casinhl.c b/newlib/libm/complex/casinhl.c
index 2864791ea..f7b51caae 100644
--- a/newlib/libm/complex/casinhl.c
+++ b/newlib/libm/complex/casinhl.c
@@ -31,6 +31,7 @@

 #include <complex.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 casinhl(long double complex z)
 {
@@ -39,3 +40,4 @@ casinhl(long double complex z)
  w = -1.0L * I * casinl(z * I);
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/casinl.c b/newlib/libm/complex/casinl.c
index 488488974..653dcc879 100644
--- a/newlib/libm/complex/casinl.c
+++ b/newlib/libm/complex/casinl.c
@@ -36,6 +36,7 @@
 __weak_alias(casinl, _casinl)
 #endif

+#ifdef _LDBL_EQ_DBL
 long double complex
 casinl(long double complex z)
 {
@@ -118,3 +119,4 @@ return;
  return w;
 }

+#endif
diff --git a/newlib/libm/complex/catanhl.c b/newlib/libm/complex/catanhl.c
index 8975fe85e..471e49927 100644
--- a/newlib/libm/complex/catanhl.c
+++ b/newlib/libm/complex/catanhl.c
@@ -31,6 +31,7 @@

 #include <complex.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 catanhl(long double complex z)
 {
@@ -39,3 +40,4 @@ catanhl(long double complex z)
  w = -1.0L * I * catanl(z * I);
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/catanl.c b/newlib/libm/complex/catanl.c
index ee2a25930..358e2aade 100644
--- a/newlib/libm/complex/catanl.c
+++ b/newlib/libm/complex/catanl.c
@@ -37,6 +37,7 @@
 __weak_alias(catanl, _catanl)
 #endif

+#ifdef _LDBL_EQ_DBL
 long double complex
 catanl(long double complex z)
 {
@@ -75,3 +76,4 @@ ovrf:
  return w;
 }

+#endif
diff --git a/newlib/libm/complex/ccoshl.c b/newlib/libm/complex/ccoshl.c
index f59fadf7a..3235911e5 100644
--- a/newlib/libm/complex/ccoshl.c
+++ b/newlib/libm/complex/ccoshl.c
@@ -32,6 +32,7 @@
 #include <complex.h>
 #include <math.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 ccoshl(long double complex z)
 {
@@ -43,3 +44,4 @@ ccoshl(long double complex z)
  w = coshl(x) * cosl(y) + (sinhl(x) * sinl(y)) * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/ccosl.c b/newlib/libm/complex/ccosl.c
index c310f4024..43d61df65 100644
--- a/newlib/libm/complex/ccosl.c
+++ b/newlib/libm/complex/ccosl.c
@@ -33,6 +33,7 @@
 #include <math.h>
 #include "cephes_subrl.h"

+#ifdef _LDBL_EQ_DBL
 long double complex
 ccosl(long double complex z)
 {
@@ -43,3 +44,4 @@ ccosl(long double complex z)
  w = cosl(creall(z)) * ch - (sinl(creall(z)) * sh) * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/cephes_subrl.c
b/newlib/libm/complex/cephes_subrl.c
index 8af11df76..d97b61380 100644
--- a/newlib/libm/complex/cephes_subrl.c
+++ b/newlib/libm/complex/cephes_subrl.c
@@ -35,6 +35,7 @@

 /* calculate cosh and sinh */

+#ifdef _LDBL_EQ_DBL
 void
 _cchshl(long double x, long double *c, long double *s)
 {
@@ -126,3 +127,4 @@ _ctansl(long double complex z)
  } while (fabsl(t/d) > MACHEPL);
  return d;
 }
+#endif
diff --git a/newlib/libm/complex/cexpl.c b/newlib/libm/complex/cexpl.c
index 8b56634ba..872116bc0 100644
--- a/newlib/libm/complex/cexpl.c
+++ b/newlib/libm/complex/cexpl.c
@@ -32,6 +32,7 @@
 #include <complex.h>
 #include <math.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 cexpl(long double complex z)
 {
@@ -44,3 +45,4 @@ cexpl(long double complex z)
  w = r * cosl(y) + r * sinl(y) * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/clogl.c b/newlib/libm/complex/clogl.c
index 3644a44fc..0743d3962 100644
--- a/newlib/libm/complex/clogl.c
+++ b/newlib/libm/complex/clogl.c
@@ -32,6 +32,7 @@
 #include <complex.h>
 #include <math.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 clogl(long double complex z)
 {
@@ -44,3 +45,4 @@ clogl(long double complex z)
  w = p + rr * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/cpowl.c b/newlib/libm/complex/cpowl.c
index 85c2c20f2..5ca64d0e1 100644
--- a/newlib/libm/complex/cpowl.c
+++ b/newlib/libm/complex/cpowl.c
@@ -32,6 +32,7 @@
 #include <complex.h>
 #include <math.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 cpowl(long double complex a, long double complex z)
 {
@@ -54,3 +55,4 @@ cpowl(long double complex a, long double complex z)
  w = r * cosl(theta) + (r * sinl(theta)) * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/cprojl.c b/newlib/libm/complex/cprojl.c
index e71c77353..59906015a 100644
--- a/newlib/libm/complex/cprojl.c
+++ b/newlib/libm/complex/cprojl.c
@@ -45,6 +45,7 @@ __RCSID("$NetBSD: cprojl.c,v 1.7 2014/10/10 00:48:18
christos Exp $");
  *
  * INFINITY + I * copysign(0.0, cimag(z))
  */
+#ifdef _LDBL_EQ_DBL
 long double complex
 cprojl(long double complex z)
 {
@@ -62,3 +63,4 @@ cprojl(long double complex z)

  return (w.z);
 }
+#endif
diff --git a/newlib/libm/complex/csinhl.c b/newlib/libm/complex/csinhl.c
index 44ed05037..1de06857c 100644
--- a/newlib/libm/complex/csinhl.c
+++ b/newlib/libm/complex/csinhl.c
@@ -32,6 +32,7 @@
 #include <complex.h>
 #include <math.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 csinhl(long double complex z)
 {
@@ -43,3 +44,4 @@ csinhl(long double complex z)
  w = sinhl(x) * cosl(y) + (coshl(x) * sinl(y)) * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/csinl.c b/newlib/libm/complex/csinl.c
index 2b96c7225..74c46fc3e 100644
--- a/newlib/libm/complex/csinl.c
+++ b/newlib/libm/complex/csinl.c
@@ -33,6 +33,7 @@
 #include <math.h>
 #include "cephes_subrl.h"

+#ifdef _LDBL_EQ_DBL
 long double complex
 csinl(long double complex z)
 {
@@ -43,3 +44,4 @@ csinl(long double complex z)
  w = sinl(creall(z)) * ch + (cosl(creall(z)) * sh) * I;
  return w;
 }
+#endif
diff --git a/newlib/libm/complex/csqrtl.c b/newlib/libm/complex/csqrtl.c
index c10a1264a..2e43f6253 100644
--- a/newlib/libm/complex/csqrtl.c
+++ b/newlib/libm/complex/csqrtl.c
@@ -49,6 +49,7 @@ __RCSID("$NetBSD: csqrtl.c,v 1.2 2014/10/11 00:43:51
christos Exp $");

 #define cpackl(r, i) ((r) + (i) * I)

+#ifdef _LDBL_EQ_DBL
 long double complex
 csqrtl(long double complex z)
 {
@@ -110,3 +111,4 @@ csqrtl(long double complex z)
  else
  return (result);
 }
+#endif
diff --git a/newlib/libm/complex/ctanhl.c b/newlib/libm/complex/ctanhl.c
index 1db886f63..c77ec41db 100644
--- a/newlib/libm/complex/ctanhl.c
+++ b/newlib/libm/complex/ctanhl.c
@@ -32,6 +32,7 @@
 #include <complex.h>
 #include <math.h>

+#ifdef _LDBL_EQ_DBL
 long double complex
 ctanhl(long double complex z)
 {
@@ -45,3 +46,4 @@ ctanhl(long double complex z)

  return w;
 }
+#endif
diff --git a/newlib/libm/complex/ctanl.c b/newlib/libm/complex/ctanl.c
index c5c887c74..332eddaba 100644
--- a/newlib/libm/complex/ctanl.c
+++ b/newlib/libm/complex/ctanl.c
@@ -34,6 +34,7 @@
 #include <math.h>
 #include "cephes_subrl.h"

+#ifdef _LDBL_EQ_DBL
 long double complex
 ctanl(long double complex z)
 {
@@ -54,3 +55,4 @@ ctanl(long double complex z)
  w = sinl(2.0L * creall(z)) / d + (sinhl(2.0L * cimagl(z)) / d) * I;
  return w;
 }
+#endif
-- 
2.22.0.rc2.383.gf4fbbf30c2-goog

-- 
-Dionna Glaze, PhD (she/her)