diff --git a/programs/develop/ktcc/trunk/libc.obj/samples/Makefile b/programs/develop/ktcc/trunk/libc.obj/samples/Makefile
index 2e72c0d2ac..3bbd6bf93b 100644
--- a/programs/develop/ktcc/trunk/libc.obj/samples/Makefile
+++ b/programs/develop/ktcc/trunk/libc.obj/samples/Makefile
@@ -22,7 +22,8 @@ clayer/msgbox.kex \
 clayer/boxlib.kex \
 thread_work.kex \
 sdltest.kex \
-shell_test.kex
+shell_test.kex \
+libc_test.kex
 
 LIBS= -lSDL -lshell -ltcc -lsound -ldialog -lrasterworks -limg -lbox -lmsgbox -lnetwork -lc.obj
 
diff --git a/programs/develop/ktcc/trunk/libc.obj/samples/build_all.sh b/programs/develop/ktcc/trunk/libc.obj/samples/build_all.sh
index 108d7dae5b..592f17afc4 100644
--- a/programs/develop/ktcc/trunk/libc.obj/samples/build_all.sh
+++ b/programs/develop/ktcc/trunk/libc.obj/samples/build_all.sh
@@ -1,21 +1,22 @@
 #SHS
 mkdir /tmp0/1/tcc_samples
-/kolibrios/develop/tcc/tcc file_io.c -o /tmp0/1/tcc_samples/file_io -lc.obj
-/kolibrios/develop/tcc/tcc whois.c -o /tmp0/1/tcc_samples/whois -ltcc -lnetwork -lc.obj
-/kolibrios/develop/tcc/tcc stdio_test.c -o /tmp0/1/tcc_samples/stdio_test -lc.obj
-/kolibrios/develop/tcc/tcc basic_gui.c -o /tmp0/1/tcc_samples/basic_gui -ltcc -lc.obj
-/kolibrios/develop/tcc/tcc consoleio.c -o /tmp0/1/tcc_samples/consoleio -lc.obj
-/kolibrios/develop/tcc/tcc dir_example.c -o /tmp0/1/tcc_samples/ls_dir -lc.obj
-/kolibrios/develop/tcc/tcc http_tcp_demo.c -o /tmp0/1/tcc_samples/http_tcp_demo -ltcc -lnetwork -lc.obj
-/kolibrios/develop/tcc/tcc math_test.c -o /tmp0/1/tcc_samples/math_test -ltcc -lc.obj
-/kolibrios/develop/tcc/tcc string_test.c -o /tmp0/1/tcc_samples/string_test -ltcc -lc.obj
-/kolibrios/develop/tcc/tcc tmpdisk_work.c -o /tmp0/1/tcc_samples/tmpdisk_work -ltcc -lc.obj
-/kolibrios/develop/tcc/tcc clayer/boxlib.c -o /tmp0/1/tcc_samples/boxlib -ltcc -lbox -lc.obj
-/kolibrios/develop/tcc/tcc clayer/dialog.c -o /tmp0/1/tcc_samples/dialog -ltcc -ldialog -lc.obj
-cp /kolibrios/develop/tcc/samples/clayer/logo.png /tmp0/1/tcc_samples/logo.png
-/kolibrios/develop/tcc/tcc clayer/libimg.c -o /tmp0/1/tcc_samples/libimg -ltcc -limg -lc.obj
-/kolibrios/develop/tcc/tcc clayer/msgbox.c -o /tmp0/1/tcc_samples/msgbox -ltcc -lmsgbox -lc.obj
-/kolibrios/develop/tcc/tcc clayer/rasterworks.c -o /tmp0/1/tcc_samples/rasterworks -ltcc -lrasterworks -lc.obj
-/kolibrios/develop/tcc/tcc thread_work.c -o /tmp0/1/tcc_samples/thread_work -ltcc -lc.obj
-/kolibrios/develop/tcc/tcc -I/kolibrios/develop/tcc/include/SDL sdltest.c -o /tmp0/1/tcc_samples/sdltest -lSDL -lsound -ltcc -lc.obj
-/kolibrios/develop/tcc/tcc shell_test.c -o /tmp0/1/tcc_samples/shell_test -lshell -ltcc -lc.obj
+../tcc file_io.c -o /tmp0/1/tcc_samples/file_io -lc.obj
+../tcc whois.c -o /tmp0/1/tcc_samples/whois -ltcc -lnetwork -lc.obj
+../tcc stdio_test.c -o /tmp0/1/tcc_samples/stdio_test -lc.obj
+../tcc basic_gui.c -o /tmp0/1/tcc_samples/basic_gui -ltcc -lc.obj
+../tcc consoleio.c -o /tmp0/1/tcc_samples/consoleio -lc.obj
+../tcc dir_example.c -o /tmp0/1/tcc_samples/ls_dir -lc.obj
+../tcc http_tcp_demo.c -o /tmp0/1/tcc_samples/http_tcp_demo -ltcc -lnetwork -lc.obj
+../tcc math_test.c -o /tmp0/1/tcc_samples/math_test -ltcc -lc.obj
+../tcc string_test.c -o /tmp0/1/tcc_samples/string_test -ltcc -lc.obj
+../tcc tmpdisk_work.c -o /tmp0/1/tcc_samples/tmpdisk_work -ltcc -lc.obj
+../tcc clayer/boxlib.c -o /tmp0/1/tcc_samples/boxlib -ltcc -lbox -lc.obj
+../tcc clayer/dialog.c -o /tmp0/1/tcc_samples/dialog -ltcc -ldialog -lc.obj
+cp     clayer/logo.png /tmp0/1/tcc_samples/logo.png
+../tcc clayer/libimg.c -o /tmp0/1/tcc_samples/libimg -ltcc -limg -lc.obj
+../tcc clayer/msgbox.c -o /tmp0/1/tcc_samples/msgbox -ltcc -lmsgbox -lc.obj
+../tcc clayer/rasterworks.c -o /tmp0/1/tcc_samples/rasterworks -ltcc -lrasterworks -lc.obj
+../tcc thread_work.c -o /tmp0/1/tcc_samples/thread_work -ltcc -lc.obj
+../tcc -I../include/SDL sdltest.c -o /tmp0/1/tcc_samples/sdltest -lSDL -lsound -ltcc -lc.obj
+../tcc shell_test.c -o /tmp0/1/tcc_samples/shell_test -lshell -ltcc -lc.obj
+../tcc libc_test.c -o /tmp0/1/tcc_samples/libc_test -ltcc -lc.obj
diff --git a/programs/develop/ktcc/trunk/libc.obj/samples/libc_test.c b/programs/develop/ktcc/trunk/libc.obj/samples/libc_test.c
new file mode 100644
index 0000000000..f961a0a23e
--- /dev/null
+++ b/programs/develop/ktcc/trunk/libc.obj/samples/libc_test.c
@@ -0,0 +1,84 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int comp(void *a, void *b) {
+	return *(int*)a - *(int*)b;
+}
+
+int main(){
+	puts("Start testing.");
+	assert(NULL == ((void*)0));
+	assert(RAND_MAX == 65535);
+	assert(min(3, 10) == 3);
+	assert(max(3, 10) == 10);
+	assert(atof("12.4") == 12.4);
+	assert(atoi("-123") == -123);
+	assert(atol("-2146483647") == -2146483647L);
+	assert(atoll("-9223372036854775806") == -9223372036854775806LL);
+	assert(!strcmp("123", "123"));
+
+	char st1[32];
+	itoa(-2341, st1);
+	assert(!strcmp(st1, "-2341"));
+
+	assert(strlen("12345") == 5);
+	assert(abs(4) == 4);
+	assert(abs(-4) == 4);
+	assert(labs(1000000000) == 1000000000);
+	assert(labs(-1000000000) == 1000000000);
+	assert(llabs(100000000000) == 100000000000);
+	assert(llabs(-100000000000) == 100000000000);
+
+	div_t output1 = div(27, 4);
+	assert(output1.quot == 6);
+	assert(output1.rem == 3);
+
+	ldiv_t output2 = ldiv(27, 4);
+	assert(output2.quot == 6);
+	assert(output2.rem == 3);
+
+	lldiv_t output3 = lldiv(27, 4);
+	assert(output3.quot == 6);
+	assert(output3.rem == 3);
+
+	char *st2 = malloc(sizeof(char)*2);
+	assert(st2 != NULL);
+	st2[0] = 'H';
+	st2[1] = 'i';
+	st2 = realloc(st2, sizeof(char)*3);
+	st2[2] = '!';
+	assert(!strcmp(st2, "Hi!"));
+	free(st2);
+
+	st2 = calloc(2, sizeof(char));
+	assert(st2 != NULL);
+	st2[0] = 'H';
+	st2[1] = 'i';
+	assert(!strcmp(st2, "Hi"));
+	free(st2);
+
+	char *start = "100.00 Rub";
+	char *end;
+	assert(strtol(start, &end, 10) == 100L);
+	assert(!strcmp(end, ".00 Rub"));
+
+	end = NULL;
+	assert(strtod(start, &end) == 100.0);
+	assert(!strcmp(end, " Rub"));
+
+	// rand и srand проверены вручную :3
+
+	char *st3 = "21.3e3Hello World!";
+	assert(atof(st3) == 21300.0);
+
+	int nums[10] = {5, 3, 9, 1, 8, 4, 2, 0, 7, 6};
+	qsort(nums, 10, sizeof(int), (int(*) (const void *, const void *))comp);
+	for (int i = 0;  i < 10; i++) {
+		assert(nums[i] == i);
+	}
+
+	puts("End testing.");
+	exit(0);
+}
\ No newline at end of file