diff --git a/newlib/libm/configure b/newlib/libm/configure
index 42d503640..657ca3c24 100755
--- a/newlib/libm/configure
+++ b/newlib/libm/configure
@@ -3725,7 +3725,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/aarch64/configure b/newlib/libm/machine/aarch64/configure
index 397abd875..1ce90bcd2 100755
--- a/newlib/libm/machine/aarch64/configure
+++ b/newlib/libm/machine/aarch64/configure
@@ -3335,7 +3335,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/arm/configure b/newlib/libm/machine/arm/configure
index 397abd875..1ce90bcd2 100755
--- a/newlib/libm/machine/arm/configure
+++ b/newlib/libm/machine/arm/configure
@@ -3335,7 +3335,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/configure b/newlib/libm/machine/configure
index 2c237a126..a8255e0d4 100755
--- a/newlib/libm/machine/configure
+++ b/newlib/libm/machine/configure
@@ -3671,7 +3671,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/i386/configure b/newlib/libm/machine/i386/configure
index 0d5fae926..7fea03b2f 100755
--- a/newlib/libm/machine/i386/configure
+++ b/newlib/libm/machine/i386/configure
@@ -3661,7 +3661,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/nds32/configure b/newlib/libm/machine/nds32/configure
index 43ea30a59..04214e714 100644
--- a/newlib/libm/machine/nds32/configure
+++ b/newlib/libm/machine/nds32/configure
@@ -3358,7 +3358,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/riscv/configure b/newlib/libm/machine/riscv/configure
index 397abd875..1ce90bcd2 100755
--- a/newlib/libm/machine/riscv/configure
+++ b/newlib/libm/machine/riscv/configure
@@ -3335,7 +3335,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}
 
diff --git a/newlib/libm/machine/spu/configure b/newlib/libm/machine/spu/configure
index 397abd875..1ce90bcd2 100644
--- a/newlib/libm/machine/spu/configure
+++ b/newlib/libm/machine/spu/configure
@@ -3335,7 +3335,7 @@ fi
 
 . ${newlib_basedir}/configure.host
 
-newlib_cflags="${newlib_cflags} -fno-builtin"
+newlib_cflags="${newlib_cflags}"
 
 NEWLIB_CFLAGS=${newlib_cflags}