More compat work. Rename libraries from LibFoo.a => libfoo.a

This makes it more straightforward to build a cross-compiler toolchain.
Also move math stuff from LibC to LibM.

LibC/.gitignore

@@ -1,4 +1,4 @@
 *.o
 *.no
 *.d
-LibC.a
+libc.a

LibC/Makefile

@@ -32,7 +32,6 @@ LIBC_OBJS = \
        ulimit.o \
        qsort.o \
        ioctl.o \
-       math.o \
        utime.o \
        sys/select.o \
        sys/socket.o \
@@ -45,7 +44,7 @@ ASM_OBJS = setjmp.no
 
 CPP_OBJS = $(AK_OBJS) $(WIDGETS_OBJS) $(LIBC_OBJS)
 
-LIBRARY = LibC.a
+LIBRARY = libc.a
 STANDARD_FLAGS = -std=c++17
 WARNING_FLAGS = -Wextra -Wall -Wundef -Wcast-qual -Wwrite-strings -Wimplicit-fallthrough
 FLAVOR_FLAGS = -fno-exceptions -fno-rtti

LibC/fd_set.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#define FD_SETSIZE 64
+#define FD_ZERO(set) memset((set), 0, sizeof(fd_set));
+#define FD_CLR(fd, set) ((set)->bits[(fd / 8)] &= ~(1 << (fd) % 8))
+#define FD_SET(fd, set) ((set)->bits[(fd / 8)] |= (1 << (fd) % 8))
+#define FD_ISSET(fd, set) ((set)->bits[(fd / 8)] & (1 << (fd) % 8))
+
+struct __fd_set {
+    unsigned char bits[FD_SETSIZE / 8];
+};
+
+typedef struct __fd_set fd_set;

LibC/install.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
 mkdir -p ../Root/usr/include/sys/
+mkdir -p ../Root/usr/lib/
 cp *.h ../Root/usr/include/
 cp sys/*.h ../Root/usr/include/sys/
+cp libc.a ../Root/usr/lib/

LibC/math.cpp

@@ -1,14 +0,0 @@
-#include <math.h>
-#include <assert.h>
-
-extern "C" {
-
-double pow(double x, double y)
-{
-    (void) x;
-    (void) y;
-    assert(false);
-}
-
-}
-

LibC/math.h

@@ -1,57 +0,0 @@
-#pragma once
-
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-
-#define HUGE_VAL 1e10000
-
-double acos(double);
-float acosf(float);
-double asin(double);
-float asinf(float);
-double atan(double);
-float atanf(float);
-double atan2(double, double);
-float atan2f(float, float);
-double cos(double);
-float cosf(float);
-double cosh(double);
-float coshf(float);
-double sin(double);
-float sinf(float);
-double sinh(double);
-float sinhf(float);
-double tan(double);
-float tanf(float);
-double tanh(double);
-float tanhf(float);
-double ceil(double);
-float ceilf(float);
-double floor(double);
-float floorf(float);
-double round(double);
-float roundf(float);
-double fabs(double);
-float fabsf(float);
-double fmod(double, double);
-float fmodf(float, float);
-double exp(double);
-float expf(float);
-double frexp(double, int* exp);
-float frexpf(float, int* exp);
-double log(double);
-float logf(float);
-double log10(double);
-float log10f(float);
-double sqrt(double);
-float sqrtf(float);
-double modf(double, double*);
-float modff(float, float*);
-double ldexp(double, int exp);
-float ldexpf(float, int exp);
-
-double pow(double x, double y);
-
-__END_DECLS
-

LibC/sys/select.h

@@ -3,21 +3,10 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <string.h>
+#include <fd_set.h>
 
 __BEGIN_DECLS
 
-#define FD_SETSIZE 64
-#define FD_ZERO(set) memset((set), 0, sizeof(fd_set));
-#define FD_CLR(fd, set) ((set)->bits[(fd / 8)] &= ~(1 << (fd) % 8))
-#define FD_SET(fd, set) ((set)->bits[(fd / 8)] |= (1 << (fd) % 8))
-#define FD_ISSET(fd, set) ((set)->bits[(fd / 8)] & (1 << (fd) % 8))
-
-struct __fd_set {
-    unsigned char bits[FD_SETSIZE / 8];
-};
-
-typedef struct __fd_set fd_set;
-
 int select(int nfds, fd_set* readfds, fd_set* writefds, fd_set* exceptfds, struct timeval* timeout);
 
 __END_DECLS