Shared library (#144)

Closes #42

.github/workflows/mruby.yml

@@ -35,6 +35,8 @@ jobs:
         run: make
       - name: install
         run: sudo make install
+      - name: ldconfig
+        run: sudo ldconfig
       - working-directory: vendor/mruby
         name: test
         run: MRUBY_CONFIG=../../bindings/mruby/build_config.rb rake test

.github/workflows/ruby.yml

@@ -33,6 +33,8 @@ jobs:
         run: make
       - name: install
         run: sudo make install
+      - name: ldconfig
+        run: sudo ldconfig
       - working-directory: bindings/ruby
         name: setup
         run: ./bin/setup

.github/workflows/rust.yml

@@ -32,6 +32,8 @@ jobs:
         run: make
       - name: install
         run: sudo make install
+      - name: ldconfig
+        run: sudo ldconfig
       - working-directory: bindings/rust
         name: test
         run: cargo test ${{matrix.packages.cargo}}

ChangeLog

@@ -1,3 +1,7 @@
+2022-12-14  Alex Kotov  <kotovalexarian@gmail.com>
+
+	* configure.ac: Enable shared library
+
 2022-12-13  Alex Kotov  <kotovalexarian@gmail.com>
 
 	* tests/Makefile.am: Fix FreeBSD builds

Makefile.am

@@ -28,6 +28,7 @@ lib_LTLIBRARIES = libkernaux.la
 # Required files #
 ##################
 
+libkernaux_la_LDFLAGS = -version-info @PACKAGE_VERSION_SO@
 libkernaux_la_LIBADD =
 libkernaux_la_SOURCES = \
 	src/assert.c \

README.md

@@ -184,6 +184,7 @@ Tips
 ./configure
 make
 sudo make install
+sudo ldconfig # on GNU/Linux
 ```
 
 This is just a usual library. You can use most of it's APIs in hosted
@@ -210,6 +211,7 @@ without it in `$PATH`:
 ```
 ./configure \
   --host='i386-elf' \
+  --disable-shared \
   --enable-freestanding \
   --with-libc \
   CC="$(which i386-elf-gcc)"

VERSION_SO

@@ -0,0 +1 @@
+0:0:0

configure.ac

@@ -35,6 +35,8 @@ AC_CONFIG_FILES([
 
 AM_INIT_AUTOMAKE([1.16 subdir-objects])
 
+AC_SUBST([PACKAGE_VERSION_SO], m4_normalize(m4_include([VERSION_SO])))
+
 
 
 ###############
@@ -378,7 +380,7 @@ AS_IF([test "$enable_checks_python" = yes -a "$enable_checks" = yes -a "$PYTHON_
 # Initialize Libtool #
 ######################
 
-LT_INIT([disable-shared])
+LT_INIT