Change --include to require absolute paths

cobc/ChangeLog

@@ -4,8 +4,9 @@
 	* cobc.c, codegen.c: new option --include FILE, to #include
 	  additional files in the C generated code. Such files can be
 	  used to statically check the number of arguments in static
-	  calls, for example. The files are put into quoted, unless
-	  they start by '<'
+	  calls, for example. The files are put into quotes, unless
+	  they start by '<'. Since C files are compiled in a temp dir,
+	  quoted files should be absolute paths.
 
 2023-10-11  Fabrice Le Fessant <fabrice.le_fessant@ocamlpro.com>
 

cobc/cobc.c

@@ -4459,7 +4459,6 @@ process_filename (const char *filename)
 		fn->translate = cobc_main_strdup (output_name);
 	} else
 	if (save_all_src || save_temps || save_c_src
-	    || cb_include_file_list
 	    || cb_compile_level == CB_LEVEL_TRANSLATE) {
 		fn->translate = cobc_main_stradd_dup (fbasename, ".c");
 	} else {

doc/gnucobol.texi

@@ -374,7 +374,9 @@ Include @file{copybook} at the beginning of the source code, as if
 @item --include @var{file.h}
 Add a @code{#include} @file{file.h} at the beginning of the generated
 C source file. The file name is put into quotes, unless it starts by
-@code{<}. The option also implies @option{-fno-gen-c-decl-static-call}.
+@code{<}. Quoted files should be absolute paths, since C files are compiled
+in temporary directories.
+The option also implies @option{-fno-gen-c-decl-static-call}.
 This option can be used to check function prototypes when
 static calls are used. When this option is used, the source file is
 compiled in the project directory (instead of the temp directory), and

tests/testsuite.src/used_binaries.at

@@ -1021,7 +1021,7 @@ AT_DATA([prog.cob], [
 AT_CHECK([$COBC -m -fstatic-call prog.cob], [0])
 
 # We ignore the error output, as it depends on the C compiler in use
-AT_CHECK([$COBC -m --include file.h -fstatic-call prog.cob], [1], [], [ignore])
+AT_CHECK([$COBC -m --include "$PWD/file.h" -fstatic-call prog.cob], [1], [], [ignore])
 
 AT_DATA([prog2.cob], [
        IDENTIFICATION   DIVISION.
@@ -1033,6 +1033,6 @@ AT_DATA([prog2.cob], [
            CALL "f" USING "Hello" BY VALUE long RETURNING NOTHING.
 ])
 
-AT_CHECK([$COBC -m --include file.h -fstatic-call prog2.cob], [0], [], [])
+AT_CHECK([$COBC -m --include "$PWD/file.h" -fstatic-call prog2.cob], [0], [], [])
 
 AT_CLEANUP