ports: Add working tcc port!

You can actually now compile programs within banan-os!!

ports/tcc/build.sh

@@ -0,0 +1,27 @@
+#!/bin/bash ../install.sh
+
+NAME='tcc'
+VERSION='0.9.27'
+DOWNLOAD_URL="https://download.savannah.gnu.org/releases/tinycc/tcc-$VERSION.tar.bz2#de23af78fca90ce32dff2dd45b3432b2334740bb9bb7b05bf60fdbfc396ceb9c"
+
+configure() {
+	./configure \
+		--prefix=/usr \
+		--sysroot=$BANAN_SYSROOT \
+		--cpu=$BANAN_ARCH \
+		--enable-cross \
+		--cross-prefix=$BANAN_TOOLCHAIN_TRIPLE- \
+		--sysincludepaths=/usr/include:/usr/lib/tcc/include \
+		--libpaths=/usr/lib \
+		--crtprefix=/usr/lib \
+		--elfinterp=/usr/lib/DynamicLoader.so
+}
+
+build() {
+	make -j$(nproc) cross-$BANAN_ARCH $BANAN_ARCH-libtcc1-usegcc=yes || exit 1
+}
+
+install() {
+	make install-unx DESTDIR=$BANAN_SYSROOT || exit 1
+	ln -sf $BANAN_ARCH-tcc $BANAN_SYSROOT/usr/bin/tcc
+}

ports/tcc/patches/0001-add-banan_os-target.patch

@@ -0,0 +1,30 @@
+diff -ruN tcc-0.9.27/configure tcc-0.9.27-banan_os/configure
+--- tcc-0.9.27/configure	2017-12-17 10:27:05.000000000 +0200
++++ tcc-0.9.27-banan_os/configure	2024-08-25 18:43:00.329466309 +0300
+@@ -49,8 +49,11 @@
+ gcc_minor=0
+ 
+ # OS specific
+-targetos=`uname`
++targetos='banan_os'
+ case $targetos in
++  banan_os)
++    confvars="$confvars ldl=no lm=no"
++	;;
+   Darwin)
+     confvars="$confvars OSX"
+     DLLSUF=".dylib"
+diff -ruN tcc-0.9.27/Makefile tcc-0.9.27-banan_os/Makefile
+--- tcc-0.9.27/Makefile	2017-12-17 10:27:05.000000000 +0200
++++ tcc-0.9.27-banan_os/Makefile	2024-08-25 18:43:44.996196450 +0300
+@@ -30,7 +30,9 @@
+  CFGWIN = -win
+  NATIVE_TARGET = $(ARCH)-win$(if $(findstring arm,$(ARCH)),ce,32)
+ else
+- LIBS=-lm
++ ifneq ($(CONFIG_lm),no)
++  LIBS=-lm
++ endif
+  ifneq ($(CONFIG_ldl),no)
+   LIBS+=-ldl
+  endif

ports/tcc/patches/0002-remove-malloc-hooks.patch

@@ -0,0 +1,23 @@
+diff -ruN tcc-0.9.27/lib/bcheck.c tcc-0.9.27-banan_os/lib/bcheck.c
+--- tcc-0.9.27/lib/bcheck.c	2017-12-17 10:27:05.000000000 +0200
++++ tcc-0.9.27-banan_os/lib/bcheck.c	2024-08-25 22:29:43.193883000 +0300
+@@ -26,7 +26,8 @@
+  && !defined(__FreeBSD_kernel__) \
+  && !defined(__DragonFly__) \
+  && !defined(__OpenBSD__) \
+- && !defined(__NetBSD__)
++ && !defined(__NetBSD__) \
++ && !defined(__banan_os__)
+ #include <malloc.h>
+ #endif
+ 
+@@ -56,7 +57,8 @@
+  || defined(__OpenBSD__) \
+  || defined(__NetBSD__) \
+  || defined(__dietlibc__) \
+- || defined(_WIN32)
++ || defined(_WIN32) \
++ || defined(__banan_os__)
+ //#warning Bound checking does not support malloc (etc.) in this environment.
+ #undef CONFIG_TCC_MALLOC_HOOKS
+ #undef HAVE_MEMALIGN

ports/tcc/patches/0003-use-crt0-instead-of-crt1.patch

@@ -0,0 +1,17 @@
+diff -ruN tcc-0.9.27/libtcc.c tcc-0.9.27-banan_os/libtcc.c
+--- tcc-0.9.27/libtcc.c	2017-12-17 10:27:05.000000000 +0200
++++ tcc-0.9.27-banan_os/libtcc.c	2024-08-26 01:26:52.175524270 +0300
+@@ -971,11 +971,11 @@
+ #else
+     /* paths for crt objects */
+     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
+-    /* add libc crt1/crti objects */
++    /* add libc crt0/crti objects */
+     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
+         !s->nostdlib) {
+         if (output_type != TCC_OUTPUT_DLL)
+-            tcc_add_crt(s, "crt1.o");
++            tcc_add_crt(s, "crt0.o");
+         tcc_add_crt(s, "crti.o");
+     }
+ #endif

userspace/programs/DynamicLoader/main.cpp

@@ -567,6 +567,9 @@ static void handle_dynamic(LoadedElf& elf)
 		syscall(SYS_CLOSE, library_fd);
 	}
 
+	if (pltgot == 0)
+		return;
+
 	// setup required GOT entries
 	reinterpret_cast<uintptr_t*>(pltgot)[0] = reinterpret_cast<uintptr_t>(elf.dynamics);
 	reinterpret_cast<uintptr_t*>(pltgot)[1] = reinterpret_cast<uintptr_t>(&elf);