math: add (obsolete) bsd drem and finite functions

4 files changed, 20 insertions, 0 deletions

diff --git a/src/math/finite.c b/src/math/finite.c
new file mode 100644
index 00000000..25a0575f
--- /dev/null
+++ b/src/math/finite.c
@@ -0,0 +1,7 @@
+#define _GNU_SOURCE
+#include <math.h>
+
+int finite(double x)
+{
+	return isfinite(x);
+}
diff --git a/src/math/finitef.c b/src/math/finitef.c
new file mode 100644
index 00000000..2c4c7714
--- /dev/null
+++ b/src/math/finitef.c
@@ -0,0 +1,7 @@
+#define _GNU_SOURCE
+#include <math.h>
+
+int finitef(float x)
+{
+	return isfinite(x);
+}
diff --git a/src/math/remainder.c b/src/math/remainder.c
index ed5c477e..6cd089c4 100644
--- a/src/math/remainder.c
+++ b/src/math/remainder.c
@@ -1,7 +1,10 @@
 #include <math.h>
+#include "libc.h"
 
 double remainder(double x, double y)
 {
 	int q;
 	return remquo(x, y, &q);
 }
+
+weak_alias(remainder, drem);
diff --git a/src/math/remainderf.c b/src/math/remainderf.c
index b418bbff..420d3bfc 100644
--- a/src/math/remainderf.c
+++ b/src/math/remainderf.c
@@ -1,7 +1,10 @@
 #include <math.h>
+#include "libc.h"
 
 float remainderf(float x, float y)
 {
 	int q;
 	return remquof(x, y, &q);
 }
+
+weak_alias(remainderf, dremf);