================
@@ -199,7 +199,10 @@ class ModuleManager {
Missing,
/// The module file is out-of-date.
- OutOfDate
+ OutOfDate,
+
+ /// The importer file is out-of-date
+ ImporterOutOfDate
----------------
devajithvs wrote:
Hi @ChuanqiXu9, the original issue/bug is mentioned in detail here (also
pasting it here):
https://github.com/root-project/root/issues/7704#issuecomment-3501531825
```C++
/* A.h */
void a() {}
```
```C++
/* B.h */
#include "A.h"
```
```C++
/* use.c */
#include "B.h"
void use() { a();}
```
```C++
/* module.modulemap */
module A { header "A.h" }
module B { header "B.h" export * }
```
Build pcms:
```bash
rm -rf prebuilt ; mkdir prebuilt
clang -cc1 -emit-module -o prebuilt/A.pcm -fmodules module.modulemap
-fmodule-name=A
clang -cc1 -emit-module -o prebuilt/B.pcm -fmodules module.modulemap
-fmodule-name=B -fmodule-file=A=prebuilt/A.pcm
```
```bash
module_repro$ ls -lrt prebuilt/
total 32
-rw-rw-r-- 1 dvalapar dvalapar 16260 Nov 7 10:27 A.pcm
-rw-rw-r-- 1 dvalapar dvalapar 16252 Nov 7 10:27 B.pcm
```
Change `A.h` and rebuild only `A.pcm`
```
echo "void b() {};" >> A.h
clang -cc1 -emit-module -o prebuilt/A.pcm -fmodules module.modulemap
-fmodule-name=A
clang -cc1 -emit-obj use.c -fmodules -fimplicit-module-maps
-fprebuilt-module-path=prebuilt
```
Gives:
```bash
use.c:1:2: fatal error: module file '/tmp/module_repro/prebuilt/A.pcm' is out
of date and needs to be rebuilt: module file out of date
1 | #include "B.h"
| ^
use.c:1:2: note: imported by module 'B' in '/tmp/module_repro/prebuilt/B.pcm'
1 error generated.
```
Even though A is recent.
```bash
module_repro$ ls -lrt prebuilt/
total 36
-rw-rw-r-- 1 dvalapar dvalapar 16252 Nov 7 10:27 B.pcm
-rw-rw-r-- 1 dvalapar dvalapar 16396 Nov 7 10:28 A.pcm
```
https://github.com/llvm/llvm-project/pull/167713
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