[build] fix build without cargo and rpm

release/lnav.spec.in

@@ -30,6 +30,7 @@ BuildRequires:  gcc-toolset-12-annobin-plugin-gcc
 BuildRequires:  gcc-toolset-12-annobin-annocheck
 BuildRequires:  autoconf
 BuildRequires:  automake
+BuildRequires:  cargo
 BuildRequires:  libarchive-devel
 BuildRequires:  libcurl-devel
 BuildRequires:  ncurses-devel
@@ -38,6 +39,7 @@ BuildRequires:  openssh
 BuildRequires:  bzip2-devel
 BuildRequires:  pcre2-devel
 BuildRequires:  readline-devel
+BuildRequires:  rust
 BuildRequires:  zlib-devel
 %if 0%{?suse_version}
 BuildRequires:  sqlite3-devel >= 3.9.0

src/Makefile.am

@@ -123,7 +123,7 @@ AM_CFLAGS = $(CODE_COVERAGE_CFLAGS)
 AM_CXXFLAGS = $(CODE_COVERAGE_CXXFLAGS) $(USER_CXXFLAGS)
 
 if HAVE_CARGO
-RUST_DEPS_CPPFLAGS = -I$(srcdir)/third-party/prqlc-c -DHAVE_RUST_DEPS=1
+RUST_DEPS_CPPFLAGS = -DHAVE_RUST_DEPS=1
 PRQLC_DIR = third-party/prqlc-c/target
 RUST_DEPS_LIBS = $(PRQLC_DIR)/release/libprqlc_c.a
 
@@ -152,6 +152,7 @@ AM_CPPFLAGS = \
 	-I$(srcdir)/third-party \
 	-I$(srcdir)/third-party/base64/include \
 	-I$(srcdir)/third-party/date/include \
+	-I$(srcdir)/third-party/prqlc-c \
 	-I$(srcdir)/third-party/rapidyaml \
 	-I$(top_srcdir)/src/third-party/scnlib/include \
 	-Wall \

src/sqlite-extension-func.cc

@@ -47,7 +47,9 @@ int sqlite3_series_init(sqlite3* db,
                         const sqlite3_api_routines* pApi);
 }
 
+#ifdef HAVE_RUST_DEPS
 rust::Vec<prqlc::SourceTreeElement> sqlite_extension_prql;
+#endif
 
 namespace lnav {
 namespace sql {
@@ -208,6 +210,7 @@ register_sqlite_funcs(sqlite3* db, sqlite_registration_func_t* reg_funcs)
         }
     }
 
+#ifdef HAVE_RUST_DEPS
     if (sqlite_extension_prql.empty()) {
         require(phier.ph_declarations.empty());
         for (const auto& mod_pair : phier.ph_modules) {
@@ -220,6 +223,7 @@ register_sqlite_funcs(sqlite3* db, sqlite_registration_func_t* reg_funcs)
             });
         }
     }
+#endif
 
     static help_text builtin_funcs[] = {
         help_text("abs", "Return the absolute value of the argument")

src/sqlite-extension-func.hh

@@ -39,7 +39,10 @@
 #include <stdint.h>
 
 #include "help_text.hh"
-#include "prqlc.cxx.hh"
+
+#ifdef HAVE_RUST_DEPS
+#    include "prqlc.cxx.hh"
+#endif
 
 struct FuncDef {
     const char* zName{nullptr};
@@ -96,7 +99,9 @@ extern sqlite_registration_func_t sqlite_registration_funcs[];
 
 int register_sqlite_funcs(sqlite3* db, sqlite_registration_func_t* reg_funcs);
 
+#ifdef HAVE_RUST_DEPS
 extern rust::Vec<prqlc::SourceTreeElement> sqlite_extension_prql;
+#endif
 
 extern "C"
 {