diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c25d23b..e2a5564 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,7 +27,7 @@ jobs:
       - name: autogen
         run: ./autogen.sh
       - name: configure
-        run: ./configure --with-arch ${{matrix.assert}} ${{matrix.null_guard}} ${{matrix.werror.mb2}} CC='${{matrix.cc}}' CFLAGS='${{matrix.opt}} ${{matrix.werror.cflag}}'
+        run: ./configure ${{matrix.assert}} ${{matrix.null_guard}} ${{matrix.werror.mb2}} CC='${{matrix.cc}}' CFLAGS='${{matrix.opt}} ${{matrix.werror.cflag}}'
       - name: make
         run: make
       - name: check
diff --git a/.gitignore b/.gitignore
index 3cd28c5..02515a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,7 +44,6 @@
 
 /tests/multiboot2_print1
 /tests/multiboot2_print2
-/tests/test_arch_i386_paging
 /tests/test_cmdline
 /tests/test_elf
 /tests/test_itoa
diff --git a/Makefile.am b/Makefile.am
index 0c66f6d..1ad3f70 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -25,19 +25,13 @@ libkernaux_a_SOURCES = \
 	src/libc.c \
 	src/printf.c
 
-if WITH_ARCH_I386
 if ARCH_I386
 libkernaux_a_SOURCES += src/arch/i386/asm.S
 endif
-libkernaux_a_SOURCES += src/arch/i386/paging.c
-TESTS += tests/test_arch_i386_paging
-endif
 
-if WITH_ARCH_X86_64
 if ARCH_X86_64
 libkernaux_a_SOURCES += src/arch/x86_64/asm.S
 endif
-endif
 
 if WITH_CMDLINE
 libkernaux_a_SOURCES += src/cmdline.c
@@ -112,10 +106,6 @@ examples_units_human_SOURCES = \
 	$(libkernaux_a_SOURCES) \
 	examples/units_human.c
 
-tests_test_arch_i386_paging_SOURCES = \
-	$(libkernaux_a_SOURCES) \
-	tests/test_arch_i386_paging.c
-
 tests_multiboot2_print1_SOURCES = \
 	$(libkernaux_a_SOURCES) \
 	tests/multiboot2_print1.c
diff --git a/README.md b/README.md
index 06629b4..1c645b9 100644
--- a/README.md
+++ b/README.md
@@ -77,10 +77,6 @@ are some non-default options:
   doesn't have effect if your assetion function was set and ends execution of
   application (kernel). However it prevents crashes because of NULL pointer
   dereference in other cases.
-* `--with-arch` - includes architecture-specific code (except assembly). May be
-  useful for testing. You can also separately enable or disable components:
-  * `--with[out]-arch-i386`
-  * `--with[out]-arch-x86-64`
 * `--with-libc` - provides the replacement for some standard C functions. Useful
   in freestanding environment, where no libc is present. You can also separately
   enable or disable components:
@@ -104,7 +100,7 @@ environment.
 
 ```
 ./autogen.sh
-./configure --enable-assert --enable-null-guard --with-arch
+./configure --enable-assert --enable-null-guard
 make
 ```
 
diff --git a/configure.ac b/configure.ac
index e37f337..3240843 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,9 +25,6 @@ AC_ARG_WITH(  [pfa],         AS_HELP_STRING([--without-pfa],        [without Pag
 AC_ARG_WITH(  [units],       AS_HELP_STRING([--without-units],      [without measurement units utils]))
 
 dnl Packages (disabled by default)
-AC_ARG_WITH(  [arch],        AS_HELP_STRING([--with-arch],          [with architecture-specific code]))
-AC_ARG_WITH(  [arch-i386],   AS_HELP_STRING([--with-arch-i386],     [with i386-specific code]))
-AC_ARG_WITH(  [arch-x86-64], AS_HELP_STRING([--with_arch-x86-64],   [with x86_64-specific code]))
 AC_ARG_WITH(  [libc],        AS_HELP_STRING([--with-libc],          [with libc replacement]))
 AC_ARG_WITH(  [libc-memset], AS_HELP_STRING([--with-libc-memset],   [with memset replacement]))
 AC_ARG_WITH(  [libc-strcpy], AS_HELP_STRING([--with-libc-strcpy],   [with strcpy replacement]))
@@ -35,20 +32,6 @@ AC_ARG_WITH(  [libc-strlen], AS_HELP_STRING([--with-libc-strlen],   [with strlen
 
 
 
-AC_DEFUN([do_arch],
-[
-if test -z "$with_arch_i386"   -a "$host_cpu" = i386;   then with_arch_i386=yes;   fi
-if test -z "$with_arch_x86_64" -a "$host_cpu" = x86_64; then with_arch_x86_64=yes; fi
-])
-AS_IF([true], do_arch)
-
-AC_DEFUN([do_with_arch],
-[
-if test -z "$with_arch_i386";   then with_arch_i386=yes;   fi
-if test -z "$with_arch_x86_64"; then with_arch_x86_64=yes; fi
-])
-AS_IF([test "$with_arch" = yes], do_with_arch)
-
 AC_DEFUN([do_with_libc],
 [
 if test -z "$with_libc_memset"; then with_libc_memset=yes; fi
@@ -76,9 +59,6 @@ AM_CONDITIONAL([WITH_PFA],           [test "$with_pfa"          != no])
 AM_CONDITIONAL([WITH_UNITS],         [test "$with_units"        != no])
 
 dnl Packages (disabled by default)
-AM_CONDITIONAL([WITH_ARCH],          [test "$with_arch"         = yes])
-AM_CONDITIONAL([WITH_ARCH_I386],     [test "$with_arch_i386"    = yes])
-AM_CONDITIONAL([WITH_ARCH_X86_64],   [test "$with_arch_x86_64"  = yes])
 AM_CONDITIONAL([WITH_LIBC],          [test "$with_libc"         = yes])
 AM_CONDITIONAL([WITH_LIBC_MEMSET],   [test "$with_libc_memset"  = yes])
 AM_CONDITIONAL([WITH_LIBC_STRCPY],   [test "$with_libc_strcpy"  = yes])
@@ -103,9 +83,6 @@ AS_IF([test "$with_pfa"           != no], [AC_DEFINE([WITH_PFA],
 AS_IF([test "$with_units",        != no], [AC_DEFINE([WITH_UNITS],                [1], [with measurement units utils])])
 
 dnl Packages (disabled by default)
-AS_IF([test "$with_arch"          = yes], [AC_DEFINE([WITH_ARCH],                 [1], [with architecture-specific code])])
-AS_IF([test "$with_arch_i386"     = yes], [AC_DEFINE([WITH_ARCH_I386],            [1], [with i386-specific code])])
-AS_IF([test "$with_arch_x86_64"   = yes], [AC_DEFINE([WITH_ARCH_X86_64],          [1], [with x86_64-specific code])])
 AS_IF([test "$with_libc"          = yes], [AC_DEFINE([WITH_LIBC],                 [1], [with libc replacement])])
 AS_IF([test "$with_libc_memset"   = yes], [AC_DEFINE([WITH_LIBC_MEMSET],          [1], [with memset replacement])])
 AS_IF([test "$with_libc_strcpy"   = yes], [AC_DEFINE([WITH_LIBC_STRCPY],          [1], [with strcpy replacement])])
diff --git a/src/arch/i386/paging.c b/src/arch/i386/paging.c
deleted file mode 100644
index d367e79..0000000
--- a/src/arch/i386/paging.c
+++ /dev/null
@@ -1,23 +0,0 @@
-#include <kernaux/arch/i386.h>
-
-// TODO: There are some static asserts just for example.
-
-__attribute__((unused))
-static const int assert0[
-    sizeof(struct KernAux_Arch_I386_PDE) == sizeof(uint32_t) ? 1 : -1
-];
-
-__attribute__((unused))
-static const int assert1[
-    sizeof(struct KernAux_Arch_I386_PTE) == sizeof(uint32_t) ? 1 : -1
-];
-
-__attribute__((unused))
-static const int assert1[
-    sizeof(struct KernAux_Arch_I386_PageDir) == 1024 * sizeof(uint32_t) ? 1 : -1
-];
-
-__attribute__((unused))
-static const int assert1[
-    sizeof(struct KernAux_Arch_I386_PageTable) == 1024 * sizeof(uint32_t) ? 1 : -1
-];
diff --git a/src/console.c b/src/console.c
index 8916494..0140418 100644
--- a/src/console.c
+++ b/src/console.c
@@ -17,7 +17,7 @@ void kernaux_console_print(const char *const s)
 
 void kernaux_console_putc(const char c __attribute__((unused)))
 {
-#if defined(ARCH_I386) && defined(WITH_ARCH_I386)
+#ifdef ARCH_I386
     kernaux_arch_i386_outportb(0x3F8, c);
 #endif
 }
diff --git a/tests/test_arch_i386_paging.c b/tests/test_arch_i386_paging.c
deleted file mode 100644
index a572831..0000000
--- a/tests/test_arch_i386_paging.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <kernaux/arch/i386.h>
-
-// TODO: There are some static asserts just for example.
-
-__attribute__((unused))
-static const int assert0[
-    sizeof(struct KernAux_Arch_I386_PDE) == sizeof(uint32_t) ? 1 : -1
-];
-
-__attribute__((unused))
-static const int assert1[
-    sizeof(struct KernAux_Arch_I386_PTE) == sizeof(uint32_t) ? 1 : -1
-];
-
-__attribute__((unused))
-static const int assert1[
-    sizeof(struct KernAux_Arch_I386_PageDir) == 1024 * sizeof(uint32_t) ? 1 : -1
-];
-
-__attribute__((unused))
-static const int assert1[
-    sizeof(struct KernAux_Arch_I386_PageTable) == 1024 * sizeof(uint32_t) ? 1 : -1
-];
-
-int main()
-{
-    return 0;
-}