[Lazarus] Trying to install Lazarus with fpc setup for debugging its libraries.

[Donald Ziesig via Lazarus]

I needed to compile fpc and the rtl and fpl libraries for debugging so I
downloaded the sources from SourceForge.

I built fpc from the sources (with -gl flag for debugging - it runs)
using the instructions in (modified for 3.0.4):
*http://wiki.freepascal.org/Installing_Lazarus#Installing_Free_Pascal_from_source_under_Linux.2FBSD*

which fpc
*fpc is /usr/local/bin/fpc**
**fpc is /usr/bin/fpc**
*

I can't install Lazarus from either:

ll lazarus*
*-rw-rw-r-- 1 donz donz 88M May 30 14:47 lazarus-project_1.8.4-0_amd64.deb**
**-rw-rw-r-- 1 donz donz 88M Jun  1 14:30 lazarus-project_1.8.4-0_amd64
(1).deb*

The package installer say:

*Error: Dependency is not satisifiable: fpc(=3.0.4)|fp-compiler(=3.0.4)*

When I start fpc it says:

fpc -i
*Free Pascal Compiler version 3.0.4**
**
**Compiler date      : 2018/05/31**
**Compiler CPU target: x86_64**
**
**Supported targets (targets marked with '{*}' are under development):**
**  Linux: Linux for x86-64**
**  FreeBSD: FreeBSD for x86-64**
**  Win64: Win64 for x64**
**  Darwin: Darwin for x86_64**
**  solaris: Solaris for x86-64 {*}**
**  OpenBSD: OpenBSD for x86-64 {*}**
**  NetBSD: NetBSD for x86-64 {*}**
**  DragonFly: DragonFly for x86-64*

etc.

/usr/local/bin/fpc -i
*Free Pascal Compiler version 3.0.4**
**
**Compiler date      : 2018/05/31**
**Compiler CPU target: x86_64**
**
**Supported targets (targets marked with '{*}' are under development):**
**  Linux: Linux for x86-64**
**  FreeBSD: FreeBSD for x86-64**
**  Win64: Win64 for x64**
**  Darwin: Darwin for x86_64**
**  solaris: Solaris for x86-64 {*}**
**  OpenBSD: OpenBSD for x86-64 {*}**
**  NetBSD: NetBSD for x86-64 {*}**
**  DragonFly: DragonFly for x86-64**
*

/usr/bin/fpc -i
*Free Pascal Compiler version 3.0.4**
**
**Compiler date      : 2018/05/31**
**Compiler CPU target: x86_64**
**
**Supported targets (targets marked with '{*}' are under development):**
**  Linux: Linux for x86-64**
**  FreeBSD: FreeBSD for x86-64**
**  Win64: Win64 for x64**
**  Darwin: Darwin for x86_64**
**  solaris: Solaris for x86-64 {*}**
**  OpenBSD: OpenBSD for x86-64 {*}**
**  NetBSD: NetBSD for x86-64 {*}**
**  DragonFly: DragonFly for x86-64**
*

I'm using Linux Mint 18.3.
**

Why doesn't the installer recognize fpc?  Where does it look for it? 
What am I missing?

Thanks,

Don

[Luca Olivetti via Lazarus]

Why doesn't the installer recognize fpc?  Where does it look for it?
What am I missing?

Because it's looking in the database of packages installed via the
package manager. Since you installed fpc from source it's not counted as
installed, hence it cannot satisfy the dependency.
My apt-fu isn't strong enough to suggest a workaround (try searching
"apt ignore dependencies"), but I'd say it would be better to install
lazarus too from source.

Bye

[Martin Schreiber via Lazarus]

Post by Donald Ziesig via Lazarus
I needed to compile fpc and the rtl and fpl libraries for debugging so I
downloaded the sources from SourceForge.
I built fpc from the sources (with -gl flag for debugging - it runs)

Please don't forget -O-.

Martin
--