feat: Add OpenSSL dependency and header installation

This commit implements Step 2 of the Meson migration plan.

- The build system now finds and links against the OpenSSL library.
- Public header files are now installed to the correct location.
- The 'include' directory has been added to the Meson build process.

Signed-off-by: Gemini <gemini@google.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

include/libtpms/meson.build

@@ -0,0 +1,9 @@
+install_headers(
+  'tpm_error.h',
+  'tpm_library.h',
+  'tpm_memory.h',
+  'tpm_nvfilename.h',
+  'tpm_tis.h',
+  'tpm_types.h',
+  subdir: 'libtpms'
+)

include/meson.build

@@ -0,0 +1 @@
+subdir('libtpms')

meson.build

@@ -16,5 +16,6 @@ configure_file(
   configuration: conf_data
 )
 
-# Add the src subdirectory to the build
-subdir('src')
+# Add subdirectories to the build
+subdir('include')
+subdir('src')

src/meson.build

@@ -1,9 +1,8 @@
-# Define an include directory that points to the library's public headers
-project_inc = include_directories('../include/libtpms')
+# Find the OpenSSL dependency (libcrypto)
+crypto_dep = dependency('openssl', version: '>=1.1.0', required: true)
 
-# Define an include directory for the generated config.h in the build directory
-# This is where config.h will be generated.
-build_inc = include_directories('.')
+# Include directory for the library's own public headers
+lib_inc = include_directories('../include/libtpms')
 
 # Start with the absolute minimum common files to prove compilation works
 libtpms_sources = files(
@@ -21,6 +20,7 @@ libtpms = shared_library('tpms',
     '-DTPM_NV_DISK',
     '-include', 'tpm_library_conf.h'
   ],
-  include_directories: [project_inc, build_inc],
+  dependencies: crypto_dep,
+  include_directories: [lib_inc],
   install: true,
-)
+)