math: Fix i386 and m68k fmod/fmodf on static build (BZ 31488)

The commit 16439f419b removed the static fmod/fmodf on i386 and m68k
with and empty w_fmod.c (required for the ABIs that uses the newly
implementation).  This patch fixes by adding the required symbols on
the arch-specific w_fmod{f}_compat.c implementation.

To statically build fmod fails on some ABI (alpha, s390, sparc) because
it does not export the ldexpf128, this is also fixed by this patch.

Checked on i686-linux-gnu and with a build for m68k-linux-gnu.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>

sysdeps/i386/fpu/w_fmod_compat.c

@@ -7,8 +7,9 @@
 # define LIBM_SVID_COMPAT 1
 # undef compat_symbol
 # define compat_symbol(a, b, c, d)
-#endif
 # include <math/w_fmod_compat.c>
-#ifdef SHARED
 libm_alias_double (__fmod_compat, fmod)
+#else
+#include <math-type-macros-double.h>
+#include <w_fmod_template.c>
 #endif

sysdeps/i386/fpu/w_fmodf_compat.c

@@ -7,8 +7,9 @@
 # define LIBM_SVID_COMPAT 1
 # undef compat_symbol
 # define compat_symbol(a, b, c, d)
-#endif
 # include <math/w_fmodf_compat.c>
-#ifdef SHARED
 libm_alias_float (__fmod_compat, fmod)
+#else
+#include <math-type-macros-float.h>
+#include <w_fmod_template.c>
 #endif

sysdeps/ieee754/ldbl-opt/s_ldexpl.c

@@ -17,13 +17,13 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#if IS_IN (libc)
+#if IS_IN (libc) && defined SHARED
 # define declare_mgen_alias(f,t)
 #endif
 #include <math-type-macros-ldouble.h>
 #include <s_ldexp_template.c>
 
-#if IS_IN (libc)
+#if IS_IN (libc) && defined SHARED
 long_double_symbol (libc, __ldexpl, ldexpl);
 long_double_symbol (libc, __wrap_scalbnl, scalbnl);
 #endif

sysdeps/m68k/m680x0/fpu/w_fmod_compat.c

@@ -7,8 +7,9 @@
 # define LIBM_SVID_COMPAT 1
 # undef compat_symbol
 # define compat_symbol(a, b, c, d)
-#endif
 #include <math/w_fmod_compat.c>
-#ifdef SHARED
 libm_alias_double (__fmod_compat, fmod)
+#else
+#include <math-type-macros-double.h>
+#include <w_fmod_template.c>
 #endif

sysdeps/m68k/m680x0/fpu/w_fmodf_compat.c

@@ -7,8 +7,9 @@
 # define LIBM_SVID_COMPAT 1
 # undef compat_symbol
 # define compat_symbol(a, b, c, d)
-#endif
 # include <math/w_fmodf_compat.c>
-#ifdef SHARED
 libm_alias_float (__fmod_compat, fmod)
+#else
+#include <math-type-macros-float.h>
+#include <w_fmod_template.c>
 #endif